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Study of Orthoexciton-to-Paraexciton Conversion in Cu2O by Excitonic Lyman Spectroscopy

M. Kubouchi 1 K. Yoshioka 1 Ryo Shimano 1 André Mysyrowicz 2 M. Kuwata-Gonokami 1
1 Department of Applied Physics
2 LOA - Laboratoire d'optique appliquée
Abstract : Using time-resolved 1s-2p excitonic Lyman spectroscopy, we study the orthoexciton-to-paraexciton transfer, following the creation of a high density population of ultracold 1s orthoexcitons by resonant two-photon excitation with femtosecond pulses. An observed fast exciton-density dependent conversion rate is attributed to spin exchange between pairs of orthoexcitons. Implication of these results on the feasibility of Bose-Einstein condensation of paraexcitons in Cu2O is discussed.
keyword : exciton
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Submitted on : Saturday, March 13, 2010 - 1:30:16 AM
Last modification on : Friday, December 3, 2021 - 11:34:03 AM

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M. Kubouchi, K. Yoshioka, Ryo Shimano, André Mysyrowicz, M. Kuwata-Gonokami. Study of Orthoexciton-to-Paraexciton Conversion in Cu2O by Excitonic Lyman Spectroscopy. Physical Review Letters, American Physical Society, 2005, 94 (1), pp.016403. ⟨10.1103/PhysRevLett.94.016403⟩. ⟨hal-00463616⟩

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