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Long-lived spin coherence of indirect excitons in GaAs coupled quantum wells

Abstract : We study spatially indirect excitons confined in a symmetric GaAs double quantum well. We show that the spin polarisation of very dilute gases can be optically imprinted, in both pure and superposition states. In the regime where indirect excitons can be localized, we observe at 350mK that the excitons spin degree of freedom is frozen with a relaxation time comparable to the coherence time and to the radiative lifetime (similar to 30 ns). Copyright (C) EPLA, 2015
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https://hal.archives-ouvertes.fr/hal-01229138
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Submitted on : Monday, November 16, 2015 - 1:38:54 PM
Last modification on : Friday, January 14, 2022 - 9:36:06 AM

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Mussie Beian, Mathieu Alloing, Edmond Cambril, Carmen Gomez Carbonell, Johann Osmond, et al.. Long-lived spin coherence of indirect excitons in GaAs coupled quantum wells. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2015, 110 (2), pp.27001 ⟨10.1209/0295-5075/110/27001⟩. ⟨hal-01229138⟩

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