LPCNO, INSA-CNRS-UPS, Université de Toulouse, France
marie@insa-toulouse.fr

报告人简介：Xavier Marie is full Professor in the National Institute of Applied Sciences (INSA-University of Toulouse). He has joined the French University Academy in 2005 (“Institut Universitaire de France”). His main present interest is the optical and spin coherence in semiconductor nanostructures and band structure engineering of semiconductors for optical telecommunication devices. He is the author or co-author of about 186 articles in international peer reviewed journals and proceedings (ISI WOS :h index : 27), 8 contributions to book chapters, et.al. He is a regular expert and member of panels for EPSRC (United Kingdom), DFG (Germany), ANR (France), ERC (Europe), etc…

报告简介：
　  Numerous proposals for future spintronic and quantum information devices are based on manipulating or storing information in the form of electronic or nuclear spin polarization in semiconductor quantum dots (QD). This approach is very attractive since a long coherence time is expected, as a result of the inhibition of the classical spin relaxation mechanisms: the discrete energy levels in semiconductor quantum dots and the corresponding lack of energy dispersion lead to a slowdown of the spin relaxation processes compared to bulk or two-dimensional structures.
　  We have studied the spin dynamics of electrons, holes, neutral and charged excitons in undoped and doped QD by time-resolved photoluminescence. We will give a review of recent experimental results on optical spin injection in InAs/GaAs, GaAs/AlGaAs and GaN/AlN quantum dots. The hyperfine interaction with nuclear spins for both electrons and holes will be discussed in details.
　  We will also present recent results on the electrical spin injection in quantum wells or quantum dots through Co/Al2O3/GaAs or CoFeB/MgO/AlGaAs tunnel barriers.

联系人：刘宝利副研究员（82648187）