Magneto-optical readout of dark exciton distribution in cuprous oxide

被引：15

作者：

Fishman, D. ^{[1
]}

Faugeras, C. ^{[2
]}

Potemski, M. ^{[2
]}

Revcolevschi, A. ^{[3
]}

van Loosdrecht, P. H. M. ^{[1
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[2] CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble, France

[3] Univ Paris 11, Inst Chim Mol & Mat Orsay, UMR 8182, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 04期

关键词：

BOSE-EINSTEIN CONDENSATION; QUANTUM SATURATION; HIGH-DENSITY; CU2O; POLARIZATION; PARAEXCITON; RECOMBINATION; LUMINESCENCE; GAS;

D O I：

10.1103/PhysRevB.80.045208

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An experimental study of the yellow exciton series in Cu2O in strong magnetic fields up to 32 T shows the optical activation of direct and phonon-assisted paraexciton luminescence due to mixing with the quadruple allowed orthoexciton state. The observed phonon-assisted luminescence yields information on the statistical distribution of occupied states. Additional time-resolved experiments provide a unique opportunity to directly determine the time evolution of the thermodynamical properties of the paraexciton gas. Because the lifetime of paraexciton is hardly affected by the optical activation in a strong magnetic field, this opens new possibilities for studies aiming at Bose-Einstein condensation of excitons in bulk semiconductors.

引用

页数：6

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