%0 Conference Proceedings
%T Photolumines,cence of "dark" excitons in CdMnTe quantum well, embedded in a microcavity
%+ Groupe d'étude des semiconducteurs (GES)
%+ Laboratoire de Spectrométrie Physique (LSP)
%A Brunetti, Adalberto
%A Vladimirova, Maria
%A Scalbert, Denis
%A André, Régis
%A Ballarini, D.
%A Amo, A.
%A Martin, Marta
%A Vina, L.
%< avec comité de lecture
%Z 07-062
%B 6th International Conference on Physics of Light-Matter Coupling in Nanostructures
%C Magdeburg (GERMANY), Germany
%V 41
%P 386-391
%8 2006-09-25
%D 2006
%R 10.1016/j.spmi.2007.03.026
%K diluted magnetic semiconductors
%K photoluminescence
%K excitons
%K RESONANCE
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Conference papers
%X A diluted magnetic semiconductor (DMS) quantum well (QW) microcavity operating in the limit of the strong coupling regime is studied by magnetoptical experiments. The interest of DMS QW relies on the possibility to vary the excitonic, resonance over a wide range of energies by applying an external magnetic field, typically about 30 meV for 5 T in our sample. In particular, the anticrossing between the QW exciton and the cavity mode can be tuned by the external field. We observe the anticrossing and formation of exciton polaritons in magneto-reflectivity experiments. In contrast, magneto-luminescence exhibits purely excitonic character. Under resonant excitation conditions an additional emission line is observed at the energy of the dark exciton. The creation of dark excitons is made possible due to heavy hole-light hole mixing in the QW. The emission at this energy could be due to a combined spin flip of an electron and a bright exciton recombination. (c) 2007 Elsevier Ltd. All rights reserved.
%G English
%L hal-00440488
%U https://hal.science/hal-00440488
%~ UGA
%~ CNRS
%~ UNIV-GRENOBLE1
%~ UNIV-MONTP2
%~ GES
%~ LIPHY
%~ UNIV-MONTPELLIER
%~ UM1-UM2