Department of Physics | Université de Sherbrooke

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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.
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Mon, 06/03/2013 - 12:30

Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
- 12:30
- D3-2040
- To be annonced
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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.
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Mon, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
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Tue, 06/11/2013 - 00:00

Wolfgang Belzig, l'Université de Constance, Allemagne
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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.

Barba D, Salem B, Morris D, Aimez V, Beauvais J, Chicoine M, et al. Ion channeling effects on quantum well intermixing in phosphorus-implanted InGaAsP/InGaAs/InP. Journal of Applied Physics. 2005;98:1-5.

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.

Morris D, Perret N, Riabinina D, Beerens J, Aimez V, Beauvais J, et al. Dynamics of photo-excited carriers in self-assembled quantum dots. In: Proceedings of SPIE - The International Society for Optical Engineering. Vol 4833.; 2002. p. 705-10.

Aimez V, Beauvais J, Beerens J, Morris D. Development of a spatially selective, high resolution quantum well intermixing (HRQWI) method based on low energy ion implantation. In: Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. Vol 2.; 2002. p. 847-8.

Aimez V, Beauvais J, Beerens J, Morris D, Lim HS, Ooi B-. Low-energy ion-implantation-induced quantum-well intermixing. IEEE Journal on Selected Topics in Quantum Electronics. 2002;8:870-9.

Ménard S, Beerens J, Morris D, Aimez V, Beauvais J, Fafard S. Magneto-photoluminescence study of intermixed self-assembled InAs/GaAs quantum dots. Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. 2002;20:1501-7.

Aimez V, Beauvais J, Drouin D, Beerens J, Morris D, Jandl S. Low energy ion implantation induced control of InP-based heterostructure properties. In: Proceedings of SPIE - The International Society for Optical Engineering. Vol 4468.; 2001. p. 95-104.

Charlebois S, Beerens J, Côté R, LavallÈe E, Beauvais J, Wasilewski ZR. Temperature dependence of the resistance resonance in weakly coupled quantum wells. Physica E. 2000;6:645-9.

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