PHOTOLUMINESCENCE UP-CONVERSION INDUCED BY INTERSUBBAND ABSORPTION IN ASYMMETRIC COUPLED QUANTUM-WELLS

被引：36

作者：

VAGOS, P ^{[1
]}

BOUCAUD, P ^{[1
]}

JULIEN, FH ^{[1
]}

LOURTIOZ, JM ^{[1
]}

PLANEL, R ^{[1
]}

机构：

[1] CNRS, MICROSTRUCT & MICROELECTR LAB, F-92220 BAGNEUX, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.70.1018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a new mechanism of photoluminescence up-conversion in undoped GaAs-AlGaAs asymmetric coupled quantum wells. Under band-to-band excitation, resonant excitation of the E1 --> E2 intersubband transition is shown to result in a finite nonthermal occupation of the E2 subband, giving rise to an E2 --> HH1 photoluminescence. The induced luminescence closely follows the polarization selection rules and the spectral dependence of the intersubband absorption. We show that this up-conversion scheme can be used to estimate the intersubband scattering time, which is found to be 2.5 +/- 0.7 ps.

引用

页码：1018 / 1021

页数：4

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