Publications

• Article dans une revue

Ultrafast short-range disordering of femtosecond-laser-heated warm dense aluminum

P. M. Leguay, A. Levy, B. Chimier, F. Deneuville, D. Descamps, C. Fourment, C. Goyon, S. Hulin, S. Petit, O. Peyrusse, J. J. Santos, P. Combis, B. Holst, V. Recoules, P. Renaudin, L. Videau, F. Dorchies

We have probed, with time-resolved x-ray absorption near-edge spectroscopy (XANES), a femtosecond-laser-heated aluminum foil with fluences up to 1 J/cm2. The spectra reveal a loss of the short-range order in a few picoseconds. This time scale is compared with the electron-ion equilibration time,…

Physical Review Letters, 2013, 111 (24), ⟨10.1103/PhysRevLett.111.245004⟩. ⟨hal-01561843⟩

• Article dans une revue

Ferromagnetism induced in ZnO nanorods by morphology changes under a nitrogen–carbon atmosphere

Brigitte Sieber, Jarno Salonen, Ermei Makila, Mikko Tenho, Markku Heinonen, Hannu Huhtinen, Petriina Paturi, Edwin Kukk, Guillaume Perry, Ahmed Addad, Myriam Moreau, Luc Boussekey, Rabah Boukherroub

RSC Advances, 2013, 3 (31), pp.12945. ⟨10.1039/c3ra41008k⟩. ⟨hal-02388422⟩

• Communication dans un congrès

Rotational temperatures in RF plasma of Ar-H2O mixtures at low and moderated pressure

Adriana Annusova, Jaroslav Krištof, Corinne Foissac, Pavel Veis, Philippe Supiot

An Ar-H2O discharge with Ar content from 0 to 95 % at 67 and 266 Pa have been studied by optical emission spectroscopy. The plasma was excited at 27 MHz by a helical cavity with a power set at 30 W. The rotational temperatures of N2(C3Πu) and OH(A2 Σ + ) emitters were determined through spectral…

XXXI International Conference on Phenomena in Ionized Gases, XXXI ICPIG, 2013, Granada, Spain. paper PS1-036, 4 p. ⟨hal-00922590⟩

• Communication dans un congrès

A 0-level packaged RF-MEMS switched wideband GaAs LNA MMIC

A. Gustafsson, C. Samuelsson, R. Malmqvist, S. Seok, M. Fryziel, N. Rolland, B. Grandchamp, T. Vähä-Heikkilä, R. Baggen

This paper focuses on the design of an RF-MEMS Dicke switched wideband LNA realized in a GaAs MMIC process that also includes a BCB cap type of wafer-level package. The 0- level packaged GaAs MEMS LNA circuit shows 10-17 dB of gain at 16-34 GHz when switched on. The off-state LNA gain is below -6…

8th European Microwave Integrated Circuits Conference, EuMIC 2013, and 43rd European Microwave Conference, EuMC 2013, European Microwave Week 2013, 2013, Nuremberg, Germany. paper EuMC/EuMIC06-2, 432-435. ⟨hal-00922494⟩

• Communication dans un congrès

Doubly coded Costas signals for grating lobes mitigation

Nadjah Touati, Charles Tatkeu, Thierry Chonavel, Atika Rivenq

In this paper, a novel design scheme for radar signal is proposed. It is based on a modification of Costas codes design by increasing the frequency separation of frequency hops beyond the orthogonality condition. Indeed, Costas codes are well known for their good range-doppler properties. Their…

PIMRC 2013 : IEEE 24th International Symposium on Personal Indoor and Mobile RadioPersonal Indoor and Mobile Radio Communications, Sep 2013, Londres, United Kingdom. pp.481-485, ⟨10.1109/PIMRC.2013.6666184⟩. ⟨hal-00946823⟩

• Article dans une revue

General solution to the Hertz-Mindlin problem via Preisach formalism

Vladislav Aleshin, Koen van den Abeele

In this paper we analyze the contact problem for two elastic spheres with friction (the Hertz–Mindlin or HM problem) and present an original solution expressed in terms of the Preisach description. The major obstacle for an efficient use of the HM mechanics in the case of general loading histories…

International Journal of Non-Linear Mechanics, 2013, 49, pp.15-30. ⟨10.1016/j.ijnonlinmec.2012.09.003⟩. ⟨hal-00795946⟩

• Article dans une revue

Giant rotary power of a fishnet-like metamaterial

S.X. Wang, F. Garet, Eric Lheurette, M. Astic, J.L. Coutaz, D. Lippens

We show experimentally and numerically that cholesteric-type metal-dielectric structures, made of twisted sub-wavelength hole elliptical–shaped arrays, exhibit strong optical activity and circular dichroism. The experimental demonstration is carried out with terahertz time-domain spectroscopy…

APL Materials, 2013, 1, pp.032116-1-6. ⟨10.1063/1.4821627⟩. ⟨hal-00871905⟩

• Communication dans un congrès

Extraordinary room temperature THz heterodyne detector: the self-switching nanodiode

J. Torres, P. Nouvel, A. Penot, L. Varani, P. Sangare, B. Grimbert, M. Faucher, Guillaume Ducournau, Christophe Gaquière, I. Iniguez-De-La-Torre, J. Mateos, T. Gonzalez

18th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructure, 2013, Matsue, Japan. ⟨hal-01926264⟩

• Article dans une revue

Ultrafast optical technique for measuring the electrical dependence of the elasticity of piezoelectric thin film : demonstration on AlN

Arnaud Devos, P. Emery, E. Defay, N. Ben Hassine, G. Parat

We present a technique based on ultrafast acoustics which permits us to measure the electrical dependence of the elastic properties of a thin piezoelectric layer. Ultrafast acoustics offers a unique way of measuring elastic properties of thin-layer in a non-destructive way using ultrashort optical…

Review of Scientific Instruments, 2013, 84, pp.015007-1-4. ⟨10.1063/1.4788936⟩. ⟨hal-00796410⟩

• Communication dans un congrès

InAlAs/InGaAa HEMTs on polyimide flexible substrate with high cut-off frequencies

J.S. Shi, Nicolas Wichmann, Yannick Roelens, S. Bollaert

Journées Nationales Technologies Emergentes en Micro-Nanofabrication, JNTE 2013, 2013, Evian, France. ⟨hal-00813609⟩