MEASURED TRANSITION FROM 2-DIMENSIONAL TO 3-DIMENSIONAL ELECTROABSORPTION AS QUANTUM-WELL BARRIERS ARE LOWERED

被引：17

作者：

GOOSSEN, KW

CUNNINGHAM, JE

WILLIAMS, MD

STORZ, FG

JAN, WY

机构：

[1] AT and T Bell Laboratories, Holmdel

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.45.13773

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electric-field-dependent measurements of photocurrent spectra of GaAs-AlxGa1-xAs multiple quantum wells are made for 0.0013<x<0.0250. Strong room-temperature exciton enhancement and quantum-confined Stark effect are observed for x as low as 0.0082. Below that x value behavior is more bulklike. It is at this x value that theory predicts that the holes should become delocalized. This study indicates that a three-dimensional electron and a two-dimensional hole results in a two-dimensional exciton in this system.

引用

页码：13773 / 13776

页数：4

共 13 条

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