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.
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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

Iliev MN, Gospodinov MM, Singh MP, Meen J, Truong KD, Fournier P, et al. Growth, magnetic properties, and Raman scattering of La[sub 2]NiMnO[sub 6] single crystals. Journal of Applied Physics. 2009;106:023515.

Singh MP, Truong KD, Jandl S, Fournier P. Long-range Ni/Mn structural order in epitaxial double perovskite La2 NiMnO6 thin films. Physical Review B. 2009;79.

Singh MP, Truong KD, Jandl S, Fournier P. Stabilization and functional properties of La3 NiAlMnO9 and La3 CoAlMnO9 magnetoelectric triple perovskites. Applied Physics Letters. 2009;94.

Singh MP, Truong KD, Jandl S, Fournier P. Long-range Ni/Mn structural order in epitaxial double perovskite La[sub 2]NiMnO[sub 6] thin films. Physical Review B. 2009;79:224421.

Gautreau O, Harnagea C, Gunawan L, Nechache R, Singh MP, Fournier P, et al. Piezoresponse force microscopy and magnetic force microscopy characterization of [gamma]-Fe2O3-BiFeO3 nanocomposite/Bi3.25La0.75Ti3O12 multiferroic bilayers. Journal of Magnetism and Magnetic Materials. 2009;321:1799-802.

Singh MP, Truong KD, Jandl S, Fournier P. Stabilization and functional properties of La[sub 3]NiAlMnO[sub 9] and La[sub 3]CoAlMnO[sub 9] magnetoelectric triple perovskites. Applied Physics Letters. 2009;94:171908.

Truong KD, Singh MP, Jandl S, Fournier P. Influence of Ni/Mn cation order on the spin-phonon coupling in multifunctional La[sub 2]NiMnO[sub 6] epitaxial films by polarized Raman spectroscopy. Physical Review B. 2009;80:134424.

Singh MP, Truong KD, Fournier P, Rauwel P, Rauwel E, Carignan LP, et al. A radical approach to promote multiferroic coupling in double perovskites. Journal of Magnetism and Magnetic Materials. 2009;321:1743-7.

Iliev MN, Gospodinov MM, Singh MP, Meen J, Truong KD, Fournier P, et al. Growth, magnetic properties, and Raman scattering of La2 NiMnO6 single crystals. Journal of Applied Physics. 2009;106.

Singh MP, Truong KD, Laverdière J, Charpentier S, Jandl S, Fournier P. Cationic ordering and role of A-site ion in manganese-based double perovskites. In: Proceedings of the 52nd Annual Conference on Magnetism and Magnetic Materials. Vol 103. AIP; 2008. 07E315.

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