Study of orthoexciton-to-paraexciton conversion in Cu2O by excitonic Lyman spectroscopy -: art. no. 016403

被引：52

作者：

Kubouchi, M

Yoshioka, K

Shimano, R

Mysyrowicz, A

Kuwata-Gonokami, M

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] JST, SORST, Bunkyo Ku, Tokyo 1138656, Japan

[3] Ecole Polytech, ENSTA, Lab Opt Appl, Palaiseau, France

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.94.016403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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页数：4

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