Département de physique | Université de Sherbrooke

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Prochains séminaires

Demain

Gabriel Poulin-Lamarre
- 12:30
- D3-2040
- To be announced
- Voir Google Calendar

lun, 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

lun, 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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mer, 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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lun, 06/10/2013 - 12:30

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

Riou G, Richard P, Jandl S, Poirier M, Fournier P, Nekvasil V, et al. Pr3+ crystal-field excitation study of apical oxygen and reduction processes in Pr2-xCexCuO4$\pm$δ. Physical Review B. 2004;69:245111-8.

Jandl S, Barilo SN, Shiryaev SV, Mukhin AA, Ivanov VY, Balbashov AM. Study of Raman active phonons in NdMnO3. Journal of Magnetism and Magnetic Materials. 2003;264:36-43.

Jandl S, Guillot-Noël O, Gourier D. Infrared absorption and Zeeman effect in Nd3+ doped YVO4. Optical Materials. 2002;19:449-54.

Truong KD, Jandl S, Poirier M. Magnetic fluctuation effects on Raman scattering in the organic superconductor κ-ET2Cu[N(CN)2]Br. Synthetic Metals. 2002;130:229-33.

Boukhris M, Jandl S, Guillot-Noël O, Gourier D, Gesland JY. Infrared and Zeeman effect measurements of ferromagnetically coupled Nd3+ ions in weakly doped LiYF4 crystals. Journal of Physics and Chemistry of Solids. 2002;63:525-33.

Riou G, Jandl S, Poirier M, Nekvasil V, Mary{\v s}ko M, Fábry J, et al. Infrared transmission study of crystal-field excitations in La2-x-yNdxSryCuO4. Physical Review B. 2002;66:2245081-7.

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.

Loa I, Divi{\v s} M, Nekvasil V, Jandl S, Syassen K, Nugroho AA, et al. Raman study of crystal-field excitations in Nd2CuO4 under pressure. Physical Review B. 2001;64:2141061-6.

Riou G, Jandl S, Poirier M, Nekvasil V, Divi{\v s} M, Fournier P, et al. Infrared transmission study of Pr2CuO4 crystal-field excitations. European Physical Journal B. 2001;23:179-82.

Barba D, Jandl S, Nekvasil V, Mary{\v s}ko M, Divi{\v s} M, Martin AA, et al. Infrared transmission study of crystal-field excitations in Sm1+xBa2-xCu3O6+y. Physical Review B. 2001;63:545281-5452810.

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