arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1307.1256cond-mat.quant-gas
收藏

全暗激子凝聚体的光学特征

Optical signatures of a fully dark exciton condensate

M. Combescot, R. Combescot, M. Alloing, F. Dubin

摘要:

我们提出了光学方法来揭示暗激子凝聚体的存在,该凝聚体根本不产生任何光致发光。结果表明:(i)暗激子密度可以由暗激子引起的激子吸收线的蓝移得到;(ii)暗凝聚体的偏振可以由蓝移对探测光子偏振的依赖性和法拉第效应得到,线偏振的暗激子不影响未被吸收光子束的偏振面.这些效应是暗激子和亮激子之间载流子交换的结果。

英文摘要:

We propose optical means to reveal the presence of a dark exciton condensate that does not yield any photoluminescence at all. We show that (i) the dark exciton density can be obtained from the blueshift of the excitonic absorption line induced by dark excitons; (ii) the polarization of the dark condensate can be deduced from the blueshift dependence on probe photon polarization and also from Faraday effect, linearly polarized dark excitons leaving unaffected the polarization plane of an unabsorbed photon beam. These effects result from carrier exchanges between dark and bright excitons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑