Publicaciones

• Communication dans un congrès

CBRAM devices as binary synapses for low-power stochastic neuromorphic systems: auditory (cochlea) and visual (retina) cognitive processing applications

M. Suri, O. Bichler, D. Querlioz, G. Palma, E. Vianello, D. Vuillaume, C. Gamrat, B. de Salvo

In this work, we demonstrate an original methodology to use Conductive-Bridge RAM (CBRAM) devices as binary synapses in low-power stochastic neuromorphic systems. A new circuit architecture, programming strategy and probabilistic STDP learning rule are proposed. We show, for the first time, how the...

IEEE International Electron Devices Meeting, Dec 2012, San Francisco, CA, United States. ⟨10.1109/IEDM.2012.6479017⟩. ⟨hal-00803088⟩

• Article dans une revue

Low frequency dielectric loss of metal/insulator/organic semiconductor junctions in ambient conditions

Romuald Ledru, Stéphane Pleutin, Bruno Grouiez, Damien Zander, H. Bejbouji, Kamal Lmimouni, Dominique Vuillaume

The complex admittance of metal/oxide/pentacene thin film junctions is investigated under ambient conditions. At low frequencies, a contribution attributed to proton diffusion through the oxide is seen. This diffusion is shown to be anomalous and is believed to be also at the origin of the bias...

Organic Electronics, 2012, 13 (10), pp.1916-1924. ⟨10.1016/j.orgel.2012.04.035⟩. ⟨hal-00787369⟩

• Article dans une revue

Phonons in Slow Motion: Dispersion Relations in Ultra-Thin Si Membranes

John Cuffe, Emigdio Chavez, Andrey Shchepetov, Pierre-Olivier Chapuis, El Houssaine El Boudouti, Francesc Alzina, Timothy Kehoe, Jordi Gomis-Bresco, Damian Dudek, Yan Pennec, Bahram Djafari-Rouhani, Mika Prunnila, Jouni Ahopelto, Clivia. M. Sotomayor Torres

We report the changes in dispersion relations of hypersonic acoustic phonons in free-standing silicon membranes as thin as \sim 8 nm. We observe a reduction of the phase and group velocities of the fundamental flexural mode by more than one order of magnitude compared to bulk values. The...

Nano Letters, 2012, 12 (7), pp.3569-3573. ⟨10.1021/nl301204u⟩. ⟨hal-00732480⟩

• Article dans une revue

Top electrode size effect on hysteresis loops in piezoresponse force microscopy of Pb(Zr,Ti)O3-film on silicon structures

S.L. Bravina, N.V. Morozovsky, E.A. Eliseev, A.N. Morozovska, J. Costecalde, Caroline Soyer, Denis Remiens, D. Deresmes

• Article dans une revue

Mechanism of ohmic Cr/Ni/Au contact formation on p-GaN

L. Magdenko, G. Patriarche, David Troadec, O. Mauguin, E. Morvan, M.A. Di Forte-Poisson, K. Pantzas, A. Ougazzaden, A. Martinez, A. Ramdane

Journal of Vacuum Science and Technology, 2012, 30, pp.022205-1-5. ⟨10.1116/1.3688486⟩. ⟨hal-00788195⟩

• Communication dans un congrès

Phononic and photonic properties of a stubbed strip waveguide

Yan Pennec, Bahram Djafari-Rouhani, Mourad Oudich, Said El-Jallal, Josemaria Escala, Alejandro Martinez, Vincent Laude

Many studies have been devoted to the search of photonic and phononic band gaps, but relatively few works are dealing with the simultaneous control of phonons and photons. Phoxonic structures hold promises for the simultaneous confinement and tailoring of sound and light waves with potential...

ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012, Symposium on Phononic Crystals and Acoustic Metamaterials, 2012, Houston, TX, United States. ⟨hal-00986895⟩

• Communication dans un congrès

Multiphonon acousto-optic interactions in normal and oblique incidence inside a 1D phoxonic cavity

Gaëtan Lévêque, E.H. El Boudouti, Abdellatif Akjouj, Yan Pennec, Bahram Djafari-Rouhani, I.E. Psarobas, N. Papanikolaou, N. Stefanou, V. Laude

SPIE 2012 Photonics West, Photonic and Phononic Properties of Engineered Nanostructures II, 2012, San Francisco, CA, United States. ⟨hal-00797763⟩

• Communication dans un congrès

Efficient control of spontaneous light emission by elastic waves

E. Almpanis, G. Gantzounis, I.E. Psarobas, N. Papanikolaou, C. Tserkezis, N. Stefanou, Bahram Djafari-Rouhani, Yan Pennec, V. Laude, A. Martinez

European Materials Research Society Spring Meeting, E-MRS Spring 2012, Symposium N : Control of light at the nanoscale : materials, techniques and applications, 2012, Strasbourg, France. ⟨hal-00797759⟩

• Article dans une revue

Light modulation in phoxonic nanocavities

Nikos Papanikolaou, I.E. Psarobas, N. Stefanou, Bahram Djafari-Rouhani, Bernard Bonello, Vincent Laude

We report on the occurrence of strong nonlinear acousto-optic interactions in phoxonic structures, that support, simultaneously, acoustic and optical localized resonant modes, under the influence of acoustic losses. Deploying a detailed theoretical investigation of the acousto-optic coupling in the...

Microelectronic Engineering, 2012, 90, pp.155-158. ⟨10.1016/j.mee.2011.04.069⟩. ⟨hal-00646833⟩

• Communication dans un congrès

Experimental demonstration of waveguiding in honeycomb and square-lattice silicon photonic crystal membranes

Daniel Puerto, A. Griol, J.M. Escalante, Bahram Djafari-Rouhani, Yan Pennec, Vincent Laude, J.C. Beugnot, Alejandro Martínez

SPIE Conference on Photonic Crystal Materials and Devices X, Apr 2012, France. pp.84250X, ⟨10.1117/12.921689⟩. ⟨hal-00759374⟩