EFFICIENT TUNING OF THE CARRIER CAPTURE EFFICIENCY OF QUANTUM-WELLS BY INTRODUCING A BARRIER ASYMMETRY

被引：18

作者：

GERARD, JM ^{[1
]}

DEVEAUD, B ^{[1
]}

REGRENY, A ^{[1
]}

机构：

[1] FRANCE TELECOM,CNET,LAB,F-22301 LANNION,FRANCE

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 02期

关键词：

D O I：

10.1063/1.110353

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A GaAs quantum well (QW) placed in an AlGaAs barrier layer of linearly graded composition has been studied by photoluminescence, in order to estimate experimentally the carrier capture efficiency of a QW in an electric field. The introduction of a slight compositional asymmetry (3% to 6% Al) between both sides of the QW allows to enhance or drastically reduce the capture probability. This tuning is efficient for temperatures as high as 77 K. Our experimental results, supported by a quantum mechanical calculation of the capture probability, suggest novel routes for optimizing QW infrared photodetectors and QW lasers.

引用

页码：240 / 242

页数：3

共 10 条

[1] OPTIMIZATION OF BARRIER THICKNESS FOR EFFICIENT CARRIER CAPTURE IN GRADED-INDEX AND SEPARATE-CONFINEMENT MULTIPLE QUANTUM-WELL LASERS [J].