INTERSUBBAND ABSORPTION BY PHOTOINDUCED EXCITONS IN UNDOPED MULTI-QUANTUM-WELLS

被引：8

作者：

OLSZAKIER, M

EHRENFREUND, E

COHEN, E

BAJAJ, J

SULLIVAN, GJ

机构：

[1] TECHNION ISRAEL INST TECHNOL,INST SOLID STATE,HAIFA,ISRAEL

[2] ROCKWELL INT CORP,CTR SCI,THOUSAND OAKS,CA 91360

来源：

SURFACE SCIENCE | 1990年 / 228卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(90)90272-A

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using the photoinduced absorption technique we distinguish between free and imperfection-bound excitons in multi-quantum-well structures. We find that the oscillator strength for the free exciton intersubband absorption is ∼ 20, and deduce a coherence length of about 5 exciton radii. We estimate the density of the binding centers for the bound exciton to be less than 1 × 1010 cm-2. © 1990.

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页码：123 / 126

页数：4

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