Department of Physics | Université de Sherbrooke

Skip to Main Content Area

Upcoming events

Mon, 05/27/2013 - 12:30

Susanne Butz, Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany.
- 12:30
- D3-2040
- Title: A Tunable Josephson Metamaterial
  
  Abstract: We present experimental data on a tunable magnetic metamaterial consisting of rf-SQUIDs. A metamaterial is a medium constructed of artifical elements, so- called meta-atoms, that interact in a specific way with an incoming electromagnetic wave. The size of and the distance between the individual meta-atoms is much smaller than the wavelength. Our metamaterial consists of one-dimensional arrays of 27 rf-SQUIDs, one chain placed inside each of the gaps of a coplanar waveguide. Due to the nonlinear inductance of the rf-SQUID, its resonance frequency is tunable in situ by applying a dc magnetic field. We demonstrate that this results in tunable effective parameters of our metamaterial. In order to obtain the effective magnetic permeability from the measured data, we employ a technique that uses only the complex transmission coefficient S21.
- Voir Google Calendar

Mon, 06/03/2013 - 12:30

Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
- 12:30
- D3-2040
- To be annonced
- Voir Google Calendar

Wed, 06/05/2013 - 10:45

INTRIQ : Lilian Childress, McGill
- 10:45
- D1-2165
- Title: Spins and photons: toward quantum networks in diamond
  
  Abstract: Long-lived electronic and nuclear spin states have made nitrogen-vacancy (NV) defects in diamond a leading candidate for solid-state quantum information processing. Moreover, their coherent optical transitions open opportunities for quantum communication. This talk will consider the motivation and requirements for optically-networked quantum devices, and explore challenges and opportunities for realizing them in diamond. In particular, the resonant excitation and emission in these defect centers enables single shot spin detection as well as observation of two-photon quantum interference; these two capabilities have enabled measurement-based entanglement between remote NV centers.
- Voir Google Calendar

Mon, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
- Voir Google Calendar

Tue, 06/11/2013 - 00:00

Wolfgang Belzig, l'Université de Constance, Allemagne
- Voir Google Calendar

Allard J-, Cornet A, Debacq C, Meurens M, Houde D, Morris D. Improved detection sensitivity of D-mannitol crystalline phase content using differential spectral phase shift terahertz spectroscopy measurements. Optics Express. 2011;19:4644-52.

Mir Y, Van Lier JE, Allard J-, Morris D, Houde D. Two-photon absorption cross section of excited phthalocyanines by a femtosecond Ti-sapphire laser. Photochemical and Photobiological Sciences. 2009;8:391-5.

Châteauneuf M, Dubois J, Allard J-, Houde D, Morris D. Detection of explosives using THz time domain spectroscopy. In: Proceedings of SPIE - The International Society for Optical Engineering. Vol 6796.; 2008.

Salem B, Morris D, Aimez V, Beauvais J, Houde D. Improved characteristics of a terahertz set-up built with an emitter and a detector made on proton-bombarded GaAs photoconductive materials. Semiconductor Science and Technology. 2006;21:283-6.

Salem B, Morris D, Aimez V, Beerens J, Beauvais J, Houde D. High performance terahertz source using ion implanted photoconductive antenna. In: Proceedings of SPIE - The International Society for Optical Engineering. Vol 5727.; 2005. p. 193-8.

Parys B, Allard J-, Morris D, Pépin C, Houde D, Cornet A. Assessment of the spectral interference method applied to the stretching measurement of diffused laser pulses. Journal of Optics A: Pure and Applied Optics. 2005;7:249-54.

Salem B, Morris D, Aimez V, Beerens J, Beauvais J, Houde D. Pulsed photoconductive antenna terahertz sources made on ion-implanted GaAs substrates. Journal of Physics Condensed Matter. 2005;17:7327-33.

Grenier P, Houde D, Jandl S, Boatner LA. Measurement of the soft polariton in KTa0.93Nb0.07O3 by time-resolved four-wave mixing. Physical Review B. 1994;50:16295-308.

Morris D, Houde D, Deveaud B, Regreny A. Ultrafast dynamics of intersubband relaxation in GaAs quantum wells: hot carrier and phonon populations effects. Superlattices and Microstructures. 1994;15:309.

Grenier P, Houde D, Jandl S, Boatner LA. Soft-mode studies in KTa0.93Nb0.07O3 with use of the time-resolved third-order optical susceptibility 3. Physical Review B. 1993;47:1-4.

login