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STATISTICS OF RADIATION AT JOSEPHSON PARAMETRIC RESONANCE

Fondation Nanosciences

Tuesday 21 May 2013 at 3pm

Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Ciprian PADURARIU ( Delft University, The Netherlands)

My talk focuses on the counting statistics of radiation emitted below the threshold of parametric resonance in a Josephson junction circuit. This theoretical work was motivated by a recent experiment [Hofheinz et al., Phys. Rev. Lett. 106, 217005 (2011)] that has measured the radiation emitted by a dc voltage-biased Josephson junction embedded in a microwave resonator. In contrast to most optical systems, a signi?cant part of the radiation emitted can be collected and converted to an output signal. This provides the opportunity to measure the correlations of the radiation. We have quantified the correlations by deriving a closed expression for the full counting statistics in the limit of long measurement times. Our results suggest that the statistics can be interpreted in terms of uncorrelated bursts, each encompassing 2N photons; this accounts for the bunching of the photon pairs produced in the course of the parametric resonance. In addition, we have studied the time correlations within the bursts and have calculated the frequency-resolved cross-correlations.

Ref.: C. Padurariu, F. Hassler, and Yuli V. Nazarov, Phys. Rev. B 86, 054514 (2012)

Quantum computing with magnetic color center in diamond

Fondation Nanosciences

Tuesday 28 May 2013 at 3pm

Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Thomas CHANIER (Wigner Institute for Solid-State Physics, Budapest)

Magnetic color centers in diamond have received a lot of interest in the research community due to their potential use as qubits for solid-state quantum computing or as single photon source for quantum key distribution in quantum cryptography. Indeed, diamond's wide band gap and long spin lifetimes offers the possibility to initialize, manipulate and readout the quantum state of the qubit and allows the existence of more than 500 color centers with most of them yet to be characterized. Transition metal (TM) impurities in diamond are known to produce numerous color centers and we propose here to study TM-related defect. After an introduction on solid-state quantum computing in diamond, we present our results.
The electronic and magnetic properties of a neutral substitutional nickel impurity in diamond are studied using density functional theory in the generalized gradient approximation (GGA). The spin-one ground state consists of two electrons with parallel spins, one located on the nickel ion in the 3d9 configuration and the other distributed among the nearest-neighbor carbons. The exchange interaction between these spins is due to p-d hybridization and is controllable with compressive hydrostatic or uniaxial strain. For sufficient strain the antiparallel spin configuration becomes the ground state. Hence, the Ni impurity forms a controllable two-electron exchange-coupled system that should be a robust qubit for solid-state quantum information processing. The chemical trends of neutral substitutional TMs 0 impurities is calculated within GGA. Crs 0 is shown to be another potential candidate for quantum computing applications. We then provide an ab-initio characterization of the negatively charged substitutional Nis - impurity in diamond using hybrid density functional calculation. Nis - is shown to carry a spin S = 3/2. The calculated hyperfine couplings on this defect support the identification of the W8 electron paramagnetic resonance center with Nis - defect. We unambiguously determine the position of Nis – acceptor level in the gap. This level is located at about 2.0 eV above the valence band maximum and corresponds to a totally occupied triplet state responsible for the magnetization. We calculated the excited state properties of the defect. Our results indicate that Nis - is associated with the 3.1 eV center which has not yet been assigned to any Ni-related defect.

Discover a new website dedicated to ALL the scientific events!

Fondation Nanosciences

Resulting from a collaboration between the Nanosciences Foundation and the Alpes section of the Soci�t� Fran�aise de Physique, the first online agenda of all scientific events of Grenoble is born:

Discover the 38 de Sciences !!

////////////Past Events/////////////

Fondation Nanosciences

All items below happened in the past!

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Ballistic Interference in Ultraclean Suspended Graphene

Fondation Nanosciences

Tuesday 7 May 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Romain MAURAND (University of Basel, Switzerland)

We have fabricated suspended monolayer graphene devices on organic lift-off resists. We have extended this technology, which was introduced by N. Trombos et al. in 2011 [1], allowing to add a multitude of bottom and top gates. Using in-situ current annealing, we show that exceptional high mobilities can be obtained in these devices approaching values of 100 m2/Vs. Specifically, we have studied the two terminal transport of ultraclean monolayer graphene whose electrostatic potential can be tuned by two gates acting respectively on the left and on the right half. The device can then be operated in the unipolar n-n’ and p-p’ or in the bioplar n-p’ and p-n’ regimes. In all these regimes we observed a striking beating pattern, which can be traced back to Fabry-Perot oscillations that are either localized in one half of the sample (left and/or right) or even extend over the whole sample. Theoretical modeling has provided a lot of insight into the role of contact doping and the steepness of the potential in the inner part of the device, but also at the edge to the source and drain contacts. Taking all geometrical parameters of the experiment into account, a remarkable good correspondence between theory and measurement could be reached. The comparison also shows that transport is ballistic.

Superconducting hybrid nano structures: properties & macroscopic quantum phenomena

Fondation Nanosciences

Tuesday 16 April 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Francesco TAFURI (University of Napoli)

High critical temperature superconductors (HTS) nano-sized systems ranging from YBaCuO nano-junctions and nano-channels to hybrid systems incorporating semiconducting InAs nanowires have been realized and characterized. Reference samples employing low temperature superconductors have been studied as well.
Escape dynamics in YBCO grain boundary Josephson junctions has revealed different tunable levels of dissipation and macroscopic quantum phenomena. By measuring switching process from the zero voltage to the finite voltage branch in the current-voltage (I-V) characteristics, their quantum signature encoded in macroscopic quantum phenomena can be extracted. Novel insights on the interplay between coherence and dissipation in the moderately damped regime have been achieved, of interest for various quantum hybrid architectures. In these junctions phase diffusion processes coexist with thermal activation and macroscopic quantum tunneling. Similar studies have been comparatively carried out on NbN Josephson junctions.
Results encourage the integration of HTS nanostructures in hybrid systems functional to various applications and in quantum cells. Possibility of integrating topological insulators into superconducting electrodes will be also briefly discussed in the search of Majorana fermions.

6th workshop "Nano and Micro-Environments for Cell Biology "

Fondation Nanosciences

Friday April 12, 2013 - from 11am to 3pm

School Phelma MINATEC

3 parvis Louis Néel - 38000 Grenoble

The Nanosciences Foundation is pleased to announce the sixth edition of our popular workshop, aiming at gathering the Grenoble-based researchers with various backgrounds (Physics, engineering, mechanics, chemistry, biology...) working in the field of:

“Nano and Micro-Environments for Cell Biology”

[See who's coming!]

[Download the final program]

[Check out the book of poster abstracts]

In order to maximise our community's networking opportunities, this event has been scheduled on the last day of the ERC BIOMIM Meeting 2013. This 3-day event will be dedicated to exciting topics at the interface of materials science, microtechnologies and cell biology.

As always, the goal of our workshop is to increase the awareness of the specialites available across the local community, while giving a chance to the young researchers (master students, PhD students, Post-doctoral fellows...) to talk about the subject they work on.

At the end of the day, a Prize for the Best Posters will be awarded. Four laureates will be offered an iPod Nano as a gift for the quality of their presentation.

Please note that in order to facilitate the attendance of everyone, oral flash presentations and posters must be in english during the Workshop.

KEY NOTE SPEAKER - common to both the ERC-BIOMIM Meeting and the 6th NaMiECeB Workshop

The organising Committee :

Catherine Picart (LMGP, Grenoble-INP)
Emmanuelle Planus (IAB, UJF)
Martial Balland (LIPhy, UJF)
Laurent BLANCHOIN (iRTSV, CEA)
Caterina TOMBA (Institut Néel)
Franz BRUCKERT (pour la Fondation Nanosciences)

For any question feel free to contact Stéphanie MONFRONT (Nanosciences Foundation) by email : stephanie.monfront@fondation-nanosciences.fr

Electron quantum optics in quantum Hall edge channels

Fondation Nanosciences

Tuesday 9 April 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Gwendal FEVE (Laboratoire Pierre Aigrain, Paris)

The ballistic propagation of electronic waves along the quantum Hall edge channels of a two dimensional electron gas bears strong analogies with photon optics. Ballistic and one-dimensional propagation are ensured by the chiral quantum Hall edge states and electronic beam splitters can be implemented using quantum point contacts. These analogies have inspired a whole set of experiments, including the realization of electronic Mach-Zehnder [1] and Hanbury-Brown & Twiss [2] interferometers, providing an efficient tool to understand both the wave and corpuscular nature of electronic propagation in quantum conductors. However, some fundamental differences with photon optics remain as electrons are interacting fermions.
I will present optics-like experiments with electrons that push these analogies down to the single particle scale, where a single electronic excitation is emitted on-demand in the conductor.
In the first experiment [3], single elementary electronic excitations are emitted in one input only, and partitioned on the electronic beam-splitter. We show that the measurement of the output currents correlations in the HBT geometry provides a direct counting, at the single charge level, of the elementary excitations (electron/hole pairs) generated by the emitter at each cycle. We observe the antibunching of low energy excitations emitted by the source with thermal excitations of the Fermi sea already present in the input leads of the splitter, which suppresses their contribution to the partition noise. This effect can be used to probe the energy distribution of the emitted wave-packets which can be tuned by varying the emitter parameters.
The second experiment implements in a quantum conductor the electronic analog [4,5] of the experiment performed by Hong-Ou-Mandel [6] in quantum optics. Two single electronic excitations emitted on demand at each input collide on the splitter. When the arrival of one electron on the splitter is delayed with respect to the other, the random partitioning of classical particles is observed. On the contrary, we measure a reduction of the current fluctuations [7] at the outputs for perfect synchronization between the sources, showing the tendency of electrons to exit in two distinct output arms when they reach the splitter simultaneously. This Pauli dip, fermionic analog of the Hong-Ou-Mandel dip for photons, demonstrates our ability to produce on-demand coherent and indistinguishable electrons by independent emitters.

[1] Ji et al., Nature 422, 415 (2003)
[2] Henny et al., Science 284 296 (1999)
[3] Bocquillon et al., Physical Review Letters 108, 196803 (2012)
[4] Ol’khovskaya et al., Physical Review Letters 101, 166802 (2008)
[5] T. Jonckheere et al., Physical Review B 86, 125425 (2012)
[6] C. K. Hong et al., Physical Review Letters 59, 2044 (1987)
[7] Bocquillon et al., Science, 339, 1054-1057 (2013)

Josephson nanocircuits as key elements to implement coherent caloritronics

Fondation Nanosciences

Tuesday 26 March 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Francesco GIAZOTTO (Scuola Normale Superiore - Pise, Italie)

The Josephson effect [1] represents perhaps the prototype of macroscopic phase coherence and is at the basis of the most widespread interferometer, i.e., the superconducting quantum interference device (SQUID) [2]. Yet, in analogy to electric interference, Maki and Griffin [3] predicted in 1965 that thermal current flowing through a temperature-biased Josephson tunnel junction is a stationary periodic function of the quantum phase difference between the superconductors. The interplay between quasiparticles and Cooper pairs condensate is at the origin of such phase-dependent heat current, and is unique to Josephson junctions. In this scenario, a temperature-biased SQUID would allow heat currents to interfere [4, 5] thus implementing the thermal version of the electric Josephson interferometer. The dissipative character of heat flux makes this coherent phenomenon not less extraordinary than its electric (non-dissipative) counterpart. Surprisingly, this striking effect has never been demonstrated so far.
In this presentation we shall report the first experimental realization of a heat interferometer [6,7]. We investigate heat exchange between two normal metal electrodes kept at different temperatures and tunnel-coupled to each other through a thermal `modulator' [5] in the form of a DC-SQUID. Heat transport in the system is found to be phase dependent, in agreement with the original prediction. With our design the Josephson heat interferometer yields magnetic-flux-dependent temperature oscillations of amplitude up to ~21 mK, and provides a flux-to-temperature transfer coefficient exceeding ~60mK/?0 at 235 mK (?0 is the flux quantum). Besides offering remarkable insight into thermal transport in Josephson junctions, our results represent a significant step toward phase-coherent mastering of heat in solid-state nanocircuits, and pave the way to the design of novel-concept coherent caloritronic devices, for instance, heat transistors and thermal splitters which exploit phase-dependent heat transfer peculiar to the Josephson effect.
In this latter context, we shall also present the concept for a further development of a Josephson heat interferometer based on a double superconducting loop [8] which allows, in principle, enhanced control over heat transport. We shall finally conclude presenting some preliminary results on a quite different prototypical thermal interferometer which could add complementary flexibility in mastering heat flux at the nanoscale.

Chi V� V?N 's Thesis Defense : "Epitaxial graphene on metal for new magnetic nanometric ...

Fondation Nanosciences

Tuesday 19 march 2013 at 10am
Room K223 - Building K - CNRS - 25 rue des martyrs

Chi VÕ V?N (Institut Néel)

Thesis supervisor: Johann CORAUX

Graphene is a new candidate for spintronics due to its long spin diffusion length and high carrier mobility. In interaction with a ferromagnet or a hea vy element, it may reveal small magnetic moments, or a Rashba-split electronic band structure, respectively. These systems are playgrounds for exploring the manipulation of graphene properties by interaction with other species, and vice versa. Three hybrid systems were developed under ultra-clean conditions : cobalt ultra-thin films deposited on graphene, and intercalated between graphene and its substrate, and self-organized Co and Fe nanoclusters on the moiré pattern formed between graphene and Ir(111). Thin, high quality, Ir(111) films on sapphire were also developed, which advantageously can replace bulk single crystals that are usually employed for the growth of high quality graphene, in the prospect of multi-technique characterizations. Using in situ surface science techniques and ex situ probes, the structural, vibrational, electronic, and magnetic properties were characterized and confronted to first-principle calculations. The graphene/Co interface involves strong C -Co interactions which are responsible for a large interface magnetic anisotropy, driving out-of-plane magnetization in spite of the strong shape anisotropy in ultra-thin films. The effect is maximized in intercalated system, which comes naturally air-protected. Nanoclusters seem to weakly interact with graphene. Small ones of 30 atoms remain superparamagnetic at 10 K, have no magnetic anisotropy, and it is difficult to saturate their magnetization even with 5 T magnetic fields. Besides, the magnetic domains size seems to exceed the cluster size, possibly pointing to interactions between clusters.

Marc GANZHORN's Thesis Defense : "Coupling magnetism and mechanics on a molecular level"

Fondation Nanosciences

Wednesday 13 march 2013 at 2pm
Room K223 - Building K - CNRS - 25 rue des martyrs

Marc GANZHORN (Institut Néel)

Thesis supervisor: Wolfgang WERNSDORFER

The magnetism of a nanoscale object, like single molecule magnets or atoms, is typically governed by the laws of quantum mechanics. Various quantum effects ranging from tunneling processes to coherent phenomena have for instance been observed in single molecule magnets [1]. Probing the quantum nature of such molecular magnets however remains a challenging task and requires the use of an appropriate magnetometer, preferably one with molecular dimensions itself [1].
Following the trend of carbon nanotube based magnetometers, we will present a promising magnetometer design based on a carbon nanotube nano electromechanical system (NEMS). In order to achieve a molecular sensitivity, the carbon nanotube NEMS should exhibit large quality factors and allow a strong coupling to a molecular magnet [2].
We will show an ultraclean, bottom up fabrication process, enabling the assembling of carbon nanotube NEMS with quality factors as high as 105. Moreover we will demonstrate that the quality factors can be tuned over 3 orders of magnitude by modifying the carbon nanotube’s electrostatic environment [3].
In a second part, we will demonstrate a strong coupling of a carbon nanotube’s quantized mechanical motion to the magnetization of a terbium double decker single molecule magnet. As a consequence of the strong spin-phonon coupling, we can observe the nuclear spin states of the terbium ion in the molecule in magnetization reversal measurements at cryogenic temperatures [4].
With both conditions satisfied, a carbon nanotube NEMS therefore makes an ideal candidate for a single molecule magnetometer.

[1] L. Bogani, W. Wernsdorfer, Molecular spintronics using single-molecule magnets, Nature Mat. 7, 179 (2008).
[2] Lassagne, B., Ugnati, D. & Respaud, M. Ultrasensitive magnetometers based on carbon nanotube mechanical resonators. Phys. Rev. Lett. 107, 130801 (2011).
[3] M. Ganzhorn and W. Wernsdorfer, Dynamics and dissipation induced by SET in carbon nanotube NEMS. Phys. Rev. Letts 108, 175502 (2012).
[4] M. Ganzhorn, S. Klyatskaya, M. Ruben, W. Wernsdorfer, Strong spin-phonon coupling between a single-molecule magnet and a carbon nanotube nanoelectromechanical system, Nature Nanotechnology (2013) doi:10.1038/nnano.2012.258

Single-atom spin qubits in silicon

Fondation Nanosciences

Wednesday 6 February 2013 at 2pm

Lecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE
23 rue des martyrs - 38000 Grenoble

By Andrea MORELLO

Centre for Quantum Computation and Communication Technology

University of New South Wales, Sydney

Abstract:

The idea of using the spin of a single donor atom in silicon to encode quantum information goes back to the Kane proposal [1] in 1998. The proposal was motivated by two observations: (i) Silicon is one of the most promising materials to host spin qubits in solid state, owing to the very weak spin-orbit coupling, and to the possibility to eliminate decoherence from nuclear spins by isotopic purification; (ii) A trillion-dollar worth industry already exists, that has developed extraordinary tools to manufacture silicon nanoscale devices in a reliable and cost-effective way.

The proposal appeared ambitious, visionary but very challenging at the time, because it relied upon the non-trivial assumption that the progress in the fabrication of classical silicon devices could be harnessed to pursue quantum information goals. Indeed, over a decade of intense efforts has been necessary before the first breakthroughs in silicon quantum technologies could be demonstrated.

I will present the first experimental demonstration of a qubit based on a single phosphorus atom in silicon. The atom is coupled to a silicon Single-Electron Transistor, and the whole device is fabricated retaining standard CMOS technologies such as ion implantation [2] and metal gates fabricated on top of high-quality silicon oxide [3].

In a single-atom device, we have demonstrated single-shot readout [4] and coherent control [5] of the donor electron spin, as well as the spins of the 31P nucleus and of a strongly-coupled 29Si nucleus. All three qubits exhibit excellent coherence and high-fidelity readability, with the nuclear ones being accessible through a quantum nondemolition measurement.

These results represent major milestones in the search for a scalable and coherent quantum computer platform, and confirm the vision of silicon as the choice material for both quantum and classical technologies.

[1] B. E. Kane, Nature 393, 133 (1998).

[2] D. N. Jamieson et al., Appl. Phys. Lett. 86, 202101 (2005).

[3] A. Morello et al., Phys. Rev. B 80, 081307(R) (2009).

[4] A. Morello et al., Nature 467, 687 (2010).

[5] J. J. Pla et al., Nature 489, 541 (2012).

Correlative Light and Electron Microscopy

Fondation Nanosciences

Friday 1 February 2013 - at 2pm

Lecture room M001- ground floor

Grenoble INP SchoolPhelma - site MINATEC

3 parvis Louis N�el - 38000 Grenoble

A ?Nano and Micro-Environments for Cell Biology? Seminar

by Bruno HUMBEL

Electron Microscopy Facility
University of Lausanne (Switzerland)

Abstract:

Cells can be seen as individuals that have each their own characteristics. In general, however, for research on specific functions, cells are cultivated in Perti dishes and are expected to respond all in the same manner to a certain stimulus. In fact standard biochemical and molecular biological experiments provide us with an averaged mean value of all the possible reactions.
Microscopy has the big advantage that individual cells can be analysed. To do this, however, the cell of interest must be identified and found. Light microscopy allows for a fast scan of a specimen and, hence, identification
of the cell under investigation. Electron microscopy allows for high resolution analysis of this individual cell. Of course one can argue that super-resolution light microscopy is superseding electron microscopy and for many applications it is the method of choice. On the other hand light, in this case fluorescence microscopy can only establish relationships between labelled molecules, whereas electron microscopy has the complete cell morphology as a reference. In addition the resolution is still higher.
There are several methods to combine the benefits of the two microscopes. With a fluorescence microscope the labelled cell is identified and even an active cellular process can be followed. Then the cells are fixed and prepared for electron microscopy. With a fluorescence image as a map the cell can be found back in the electron microscope. Fluorescently labelled structures can be identified on a section and then again with the map the individual cell can be further analysed by electron microscopy. With a correlative approach cell biology can enter a new dimension to study single cells in their natural environment, in the tissue.
In my talk I will address the different approaches of correlative microscopy we chose.

Contact:

This seminar is organised with the help of Catherine PICART (LMGP) : catherine.picart@grenoble-inp.fr.

However if you should have any "practical" question, please contact St�phanie MONFRONT : stephanie.monfront@fondation-nanosciences.fr� // 04 56 52 96 03.

This event is open for everyone, no registration is required.

Siddhart NAMBIAR's Thesis Defense : "Plasmon Assisted Si based Electo-Optical Devices"

Fondation Nanosciences

Thursday 20 December 2012 at 2.30pm

Amphi Dautreppe, B�timent B, CEA-Grenoble

Siddhart NAMBIAR (CEA/LETI) �

Thesis supervisor: Marc SANQUER

Although the optical properties of nanostructured metals were known for many decades, it is only in the past few years that this field has attracted wide interest. This is in part due to the progress in nanofabrication techniques. The field of plasmonics is often touted as the next generation platform that could interface nanoscale electronics and Si photonics. With current electronic systems nearing saturation, the migration to photonic systems would become inevitable. Crucial to achieving this integration is to predict the electromagnetic response of these nanophotonic components. Electromagnetic numerical tools are one way to understand the optical properties of these plasmon based nanophotonic components. By and large the thesis deals with numerically analysing the propagation and near field characteristics of plasmon based components for Si photonics. The two principal EM modelling tools used in this regard are the boundary element method as well as the finite difference time domain. Two main kind of active plasmonic active devices were investigated: integrated modulators, and free space radiation photodetectors. The critical issue of an efficient coupling of light into a very confined guided plasmonic mode was first investigated so as to isolate the main modal governing contributions. Next, a new structure of plasmon assisted modulator was proposed and a complete optical design taking into the technological constraints of a CMOS foundry is provided and discussed. Finally a design optimizing the radiative coupling to the absorption of a Ge dot, using a plasmonic dipolar antenna, is studied. In particular the radiative engineering of the supporting SOI substrate is shown to have a tremendous effect on the final performance of the device.
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2012 Thesis Prize Award Ceremony

Fondation Nanosciences

Wednesday 5 December 2012 from 4.30pm

Lecture Room A - CNRS

25 rue des martyrs - 38000 Grenoble

This year, the Foundation's thesis prize will be given to two laureates:

�� Anne-C�cile REYMANN, from iRTSV/LPCV

�� Ioan Mihai POP, from Institut N�el

This ceremony will also give us the opportunity to meet and congratulate� 3 out of the 9 scientists of the Foundation's network who were laureates in 2012 of ERC Starting grants.

All the invited speakers will give a brief talk about their research field and the ceremony will be concluded with a cocktail, to which all attendees are invited.

ElecMol'12

Fondation Nanosciences

December 3 - 7, 2012

MINATEC - Grenoble, FRANCE

We are pleased to announce the 6th edition of the international and� interdisciplinary meeting ElecMol?12 which will focus on recent advances in molecular and organic (opto)electronics. The 2010 edition was a great success with more than 350 international participants and an outstanding scientific program with invited lectures given by worldwide renowned personalities in different fields of molecular electronics ranging from single molecules and quantum dots to supramolecular architectures and biomimetic devices.

This year edition will consist in 16 Invited Lectures , 44 Oral Communications and Poster Communications.

SCOPE, TOPICS & INVITED LECTURERS

"ElecMol'12" will focus on recent advances in molecular and organic (opto)electronics in the fields of:

-T1: Single Molecules & Quantum Dots: Junctions/Memories & Switches
Prof. M. IRIE (Rikkyo Univ., Japan)
Prof. L. VENKATARAMAN (Columbia Univ., USA)

-T2: Organic Electronics & Spintronics: Materials & Devices

Prof. A. FACCHETTI (Nortwestern Univ. & Polyera, USA)
Prof. M.E. THOMPSON (Univ. of Southern California, USA)

-T3: Organic Optoelectronics & Photonics: Materials & Devices

Dr. F. CHARRA (CEA-IRAMIS, France)
Prof. M. LECLERC (Univ. Laval, Canada)

-T4: Graphene, Carbon Nanotubes & Nanowires: Synthesis & Devices

Prof. T.F. HEINZ (Columbia Univ.,USA)
Prof. M. PRATO (Univ. Of Trieste, Italy)

-T5: Self-Assembly & Supramolecular Architectures

Prof. P.F. NEALEY (Univ. of Wiscosin-Madison, USA)
Prof. J.F. STODDART (Nortwestern Univ., USA)

-T6: Scanning Probe Microscopies & Near Field Approaches

Prof. L. GRILL (Fritz-Haber Institute, Germany)
Prof. R.M. WIESENDANGER (Univ. of Hamburg, Germany)

-T7: Molecular Theoretical Modelling

Prof. C. DELERUE (IEMN-Lille, France)
Prof. A. TROISI (Univ. of Warwik, UK)

-T8: Bioinspired Approaches & Biomimetic Devices

Prof. P. CHAIKIN (New-York Univ., USA)
Prof. M. SHIONOYA (The Univ. of Tokyo, Japan)

SCIENTIFIC PROGRAM

ElecMol?10 is a single-session conference with a program consisting in 16 Invited Lectures / 44 Oral Communications / Poster Communications

LOCATION

The meeting will be held in Grenoble within CEA?s MINATEC center (www.minatec.com)

CONTACT
E-mail: info@elecmol.com & Website: www.elecmol.com

ORGANIZING COMMITTEE

Dr. Xavier Blase Institut N�el
Dr. Vincent Bouchiat Institut N�el
Dr. Christophe Bucher DCM
Dr. St�phane Campidelli SPEC
Dr. Johann Coraux Institut N�el
Ms. C�line Deleval SPrAM [Secretary of ElecMol12]
Dr. Jean-Christophe Gabriel CEA-DSM
Ms. Dominique GIRARD CEA-DSM
Dr. Bruno Jousselme SPCSI
Dr. Fr�d�ric Lafolet DCM
Dr. Patrice Rannou SPrAM
Prof. Sa�d Sadki SPrAM
Dr. Jean Weiss IChS

SCIENTIFIC COMMITTEE

Prof. Andr�-Jean ATTIAS (U. Paris VI, France)
Prof. Alberto CREDI (U. Bologna, Italy)
Prof. Luisa de COLA (U. M�nster, Germany)
Dr. Mandar M. DESHMUKH (Tata Intitute/Mumbai, India)
Dr. G�rald DUJARDIN (CNRS-Orsay, France)
Prof. Xiaohong FANG (Chinese Acad. Sci.,People?s Republic of China)
Prof. C. Daniel FRISBIE (U. Minnesota, USA)
Dr. Marcelo GOFFMAN (CEA-Saclay, France)
Prof. Philippe LAFARGE (U. Paris VII, France)
Prof. Jean-Marie LEHN (ISIS-Strasbourg, France)
Dr. Kamal LMIMOUNI (IEMN-Lille,France)
Prof. Richard MARTEL (U. Montreal, Canada)
Dr. Serge PALACIN (CEA-Saclay, France)
Prof. Soo Young PARK (Seoul Nat. U., South Korea)
Prof. Mark A. RATNER (Northwestern U.,USA)
Prof. John A. ROGERS (U. Illinois, USA)
Prof. Hiroshi SAKAGUCHI (Shizuoka U., Japan)
Prof. Nadrian C. SEEMAN (New-York U., USA)
Dr. Shukichi TANAKA (KARC-NiCT Kobe, Japan)
Prof. Yasuo WADA (Toyo Univ.,Japan)

Low temperature plasma-surface interactions: hydrogen plasma and graphene

Fondation Nanosciences

Monday 12 November 2012 at 2pm

Lecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE
23 rue des martyrs - 38000 Grenoble

By David GRAVES

University of California, Berkeley - USA

Nanosciences Foundation Chair of Excellence 2011 - 2013

Abstract:

Low temperature plasmas are generally far from equilibrium, with different species displaying very different distributions of energy and velocity. This characteristic can be exploited in a vast number of different ways, and this is especially true for applications involving surface modification. The plasma properties can be vastly altered by changing the conditions of the plasma, including the way the elecromagnetic power is delivered to charged species, the gas chemistry, and a multitude of other characteristics. The success of plasma technology in manufacturing semiconductor devices is a leading example.

In this talk, I will begin by discussing some of the reasons that plasma has been so successful in etching nanoscale features. The use of basic studies, both computational and experimental, have been key to these insights. Then, I will address the special case of graphene and the ways that plasma technology may prove to be important in making graphene-based devices. The successful development of graphene-based technologies relies on the capability to grow and integrate this new material into sophisticated devices but the nm-scale control of graphene processing challenges current processing technology, especially conventional lithography and plasma etching. Plasma-graphene interactions must be carefully controlled to avoid damage to the active layers of graphene-based nanoelectronic devices. The use of pulsed-plasmas lowers average ion energies (thus minimizing surface damage) and can be used to control neutral chemistry as well; however, the use of pulsed plasmas complicates an already complex plasma-surface interaction problem.

We have therefore developed and applied molecular dynamics (MD) simulations, coupled with experiments, to better understand and control the plasma-graphene surface interaction. We investigate the interaction between hydrogen plasma species and single/multilayer graphene nanoribbon (GNR) samples via MD simulations. C-H interatomic potential curves and associated energy barriers are reported depending on the H impact position (top, bridge, hollow or edge sites of GNRs). The influence of graphene temperature and incident species energy on adsorption, reflection and penetration mechanisms is presented. Except for impacts at GNRs edges or at defects location, H species are shown to experience a repulsive force due to delocalized ?-electrons which prevents any species with less than ~ 0.6eV to adsorb on the graphene surface. Chemical bonding of H to C requires a local rehybridization from sp2 to sp3 resulting in structural changes of the graphene sample. Energetic H+ bombardment of stacked multilayer graphene sheets are analyzed and the possibility to store hydrogen between adjacent layers is discussed.

*In collaboration with : E. Despiau-Pujo1,� A. Davydova1, G. Cunge1, L. Magaud2
1 CNRS/UJF-Grenoble1/CEA LTM
2 CNRS/UJF-Grenoble 1 Institut N�el

5th workshop "Nano and Micro-Environments for Cell Biology "

Fondation Nanosciences

Thursday November 8, 2012 - from 9am to 3pm

Salle des s�minaires de l'IAB, La Tronche

The Nanosciences Foundation organises for the fifth time a workshop aiming at gathering the Grenoble-based researchers with various backgrounds (Physics, engineering, mechanics, chemistry, biology...) working in the field of:

?Nano and Micro-Environments for Cell Biology?

The goal of this event is to increase the awareness of the specialites available across the local community, while giving a chance to the young researchers (master students, PhD students, Post-doctoral fellows...) to talk about the subject they work on.

For this purpose, a Poster Day will be carried out (with flash oral presentations + poster session), to cover the following topics:

Nano and Microsystems for biological objects
Cytoskeleton and force generation
Biomimetic systems

Experimental and modelisation works shall be inserted in one of those three categories.

At the end of the day, a Prize for the Best Poster of each category will be awarded. The three laureates will be offered an iPod Nano as a gift for the quality of their presentation.

Invited speakers:

[Read their abstracts]

This event is free and open to all researchers. It is however mandatory to register online in order to get an entry pass and to access our free buffet during the workshop.

Hurry up, the number of available seats is limited!

The organising Committee :

Catherine Picart (LMGP, Grenoble-INP)
Emmanuelle Planus (IAB, UJF)
Martial Balland (LIPhy, UJF)
Laurent BLANCHOIN (iRTSV, CEA)
Franz BRUCKERT (pour la Fondation Nanosciences)

For any question related to the logistical organisation, feel free to contact St�phanie MONFRONT (Nanosciences Foundation) by email : stephanie.monfront@fondation-nanosciences.fr

Workshop on Graphene in Grenoble

Fondation Nanosciences

Thursday 18 Octobre 2012 - from 9.30am to 4.00pm

Phelma POLYGONE

The Nanosciences Foundation is organising the first workshop gathering all Grenoble-based researchers whose work is involving / focused on Graphene.

Whereas various projects such as the large "Graphene Flagship" are being launched, it is crucial for our local community to raise its voice and improve its visibility at both national and European scales.

Grenoble holds a unique position in France, and warrants a role to play in Graphene research in view of the numerous scientific results already obtained and recognised internationally.

This day aims at:

engaging in the promotion of the Grenoble-based research in graphene
allowing attendants to improve their visibility of all activities involving graphene in Grenoble
encouraging young researchers to present their work (master students, PhD students, post-doctoral fellows) thanks to a poster session to be held during the Lunch break.

At the end of the day, a young scientist will be awarded the 'Best Poster Prize' - along with an iPod Nano^� to honour his/her work.

Registration :

Attending this workshop is free of charge and open to anyone. However, logistical matters require that all attendant register ahead of the event. Registration is therefore mandatory to provide attendants with a badge - allowing access to the workshop and to its (free) lunch buffet.

Do not wait the last minute, number of available seats is limited!

Organisation Committee:

G�rard Bidan (CEA-INAC),
Vincent Bouchiat (CNRS-NEEL),
Johann Coraux (CNRS-NEEL),
Alessandro Cresti (CNRS-IMEP),
Jean Dijon (CEA-LITEN),
Alain Fontaine (Fondation Nanosciences),
Jean-Christophe Gabriel (Programme transverse Chimtronique CEA),
Laurence Magaud (CNRS-NEEL),
No�l Magn�a (CEA-DRT),
Mireille Mouis (CNRS-IMEP),
Marek Potemski (CNRS-LNCMI),
Etienne Quesnel (CEA-DRT),
Vincent Renard (UJF - INAC).

Should you have any question regarding the logistical organisation of this event, please contact St�phanie Monfront (Fondation Nanosciences) by emai: stephanie.monfront@fondation-nanosciences.fr

Daniel VALENTE's Thesis Defense : "Quantum Optics with Semiconducting Artificial Atoms"

Fondation Nanosciences

Monday 15 October 2012 at 2pm
Room "Remy Lemaire" K 223 - Building K

Institut N�el - CNRS
25 avenue des Martyrs - 38000 Grenoble

Daniel VALENTE (Institut N�el) �

Thesis supervisor: Jean Philippe POIZAT

�

The thesis focuses on quantum optical effects in semiconducting artificial atoms. We first investigate theoretically a single emitter coupled to a one-dimensional waveguide. This system allows for light propagation while preserving sensitivity at the single-photon level, which has motivated proposals for quantum gates and single-photon transistors. A scheme to monitor stimulated emission at the single-photon level in this one-dimensional open space is proposed, using an excited emitter (e.g. a quantum dot) and a classical pump (laser). We show that light is emitted in the stimulating mode and that the atom performs classical Rabi oscillation. The fully quantum dynamics is also explored, where a single-photon packet interacts with an initially excited emitter. In contrast with the case of a classical pump, stimulation by a single photon is irreversible, i.e., no oscillation takes place. Stimulation is optimal for a packet three times shorter than the spontaneously emitted one. We show how this optimal irreversible stimulated emission can be applied to perform universal quantum cloning. The same device provides either optimal quantum cloning or maximally entangled photon pairs, depending only on the size of the incoming packet.
In the second part of the thesis, we investigate the spontaneous emission spectrum of a semiconducting quantum dot weakly coupled to a microcavity. In particular, we address the problem of cavity feeding, where the quantum dot spontaneously emits photons at the frequency of an off-resonance cavity. The influence of phonons in the cavity feeding mechanism is analyzed. An important distortion of the apparent cavity peak induced by the presence of phonons is demonstrated. These effects are topical and can be implemented in state-of-the-art semiconducting devices.

Fondation Nanosciences

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STATISTICS OF RADIATION AT JOSEPHSON PARAMETRIC RESONANCE

Tuesday 21 May 2013 at 3pm

Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Quantum computing with magnetic color center in diamond

Tuesday 28 May 2013 at 3pm

Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Discover a new website dedicated to ALL the scientific events!

Discover the 38 de Sciences !!

////////////Past Events/////////////

Ballistic Interference in Ultraclean Suspended Graphene

Tuesday 7 May 2013 at 3pmRoom "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Superconducting hybrid nano structures: properties & macroscopic quantum phenomena

Tuesday 16 April 2013 at 3pmRoom "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

6th workshop "Nano and Micro-Environments for Cell Biology "

Friday April 12, 2013 - from 11am to 3pm

KEY NOTE SPEAKER - common to both the ERC-BIOMIM Meeting and the 6th NaMiECeB Workshop

The organising Committee :

Electron quantum optics in quantum Hall edge channels

Tuesday 9 April 2013 at 3pmRoom "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Josephson nanocircuits as key elements to implement coherent caloritronics

Tuesday 26 March 2013 at 3pmRoom "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Chi V� V?N 's Thesis Defense : "Epitaxial graphene on metal for new magnetic nanometric ...

Tuesday 19 march 2013 at 10amRoom K223 - Building K - CNRS - 25 rue des martyrs

Marc GANZHORN's Thesis Defense : "Coupling magnetism and mechanics on a molecular level"

Wednesday 13 march 2013 at 2pmRoom K223 - Building K - CNRS - 25 rue des martyrs

Single-atom spin qubits in silicon

Wednesday 6 February 2013 at 2pmLecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE23 rue des martyrs - 38000 Grenoble

Abstract:

Correlative Light and Electron Microscopy

Friday 1 February 2013 - at 2pm

Abstract:

Contact:

Siddhart NAMBIAR's Thesis Defense : "Plasmon Assisted Si based Electo-Optical Devices"

Thursday 20 December 2012 at 2.30pm

Amphi Dautreppe, B�timent B, CEA-Grenoble

2012 Thesis Prize Award Ceremony

Wednesday 5 December 2012 from 4.30pm

Lecture Room A - CNRS

25 rue des martyrs - 38000 Grenoble

ElecMol'12

December 3 - 7, 2012

MINATEC - Grenoble, FRANCE

SCOPE, TOPICS & INVITED LECTURERS

SCIENTIFIC PROGRAM

LOCATION

SCIENTIFIC COMMITTEE

Low temperature plasma-surface interactions: hydrogen plasma and graphene

Monday 12 November 2012 at 2pmLecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE23 rue des martyrs - 38000 Grenoble

Abstract:

5th workshop "Nano and Micro-Environments for Cell Biology "

Thursday November 8, 2012 - from 9am to 3pm

Invited speakers:

The organising Committee :

Workshop on Graphene in Grenoble

Thursday 18 Octobre 2012 - from 9.30am to 4.00pm

Registration :

Organisation Committee:

Daniel VALENTE's Thesis Defense : "Quantum Optics with Semiconducting Artificial Atoms"

Monday 15 October 2012 at 2pmRoom "Remy Lemaire" K 223 - Building K

Institut N�el - CNRS25 avenue des Martyrs - 38000 Grenoble

Tuesday 7 May 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Tuesday 16 April 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Tuesday 9 April 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Tuesday 26 March 2013 at 3pm
Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS

Tuesday 19 march 2013 at 10am
Room K223 - Building K - CNRS - 25 rue des martyrs

Wednesday 13 march 2013 at 2pm
Room K223 - Building K - CNRS - 25 rue des martyrs

Wednesday 6 February 2013 at 2pm

Lecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE
23 rue des martyrs - 38000 Grenoble

Monday 12 November 2012 at 2pm

Lecture room P015 - Ecole Grenoble INP Phelma - Site POLYGONE
23 rue des martyrs - 38000 Grenoble

Monday 15 October 2012 at 2pm
Room "Remy Lemaire" K 223 - Building K

Institut N�el - CNRS
25 avenue des Martyrs - 38000 Grenoble