OPTICAL TIME-OF-FLIGHT MEASUREMENT OF CARRIER TRANSPORT IN GAAS ALXGA1-XAS AND IN0.53GA0.47AS IN0.52AL0.48AS MULTIQUANTUM WELLS

被引：8

作者：

GUPTA, S ^{[1
]}

DAVIS, L ^{[1
]}

BHATTACHARYA, PK ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT ELECT ENGN & COMP SCI,ULTRAFAST SCI LAB,ANN ARBOR,MI 48109

来源：

APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 12期

关键词：

D O I：

10.1063/1.107269

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An all-optical time-of-flight technique is used for measuring perpendicular carrier transport in semiconductor heterostructures and multiquantum wells (MQWs). This technique is based on measuring a change in surface reflectance due to the absorption nonlinearities induced by the carriers, and has a temporal resolution of approximately 1 ps. Typical results on a GaAs/AlxGa1-xAs MQW and an In0.53Ga0.47As/In0.52Al0.48As MQW are compared. The observed fast transport times can only be explained by a field-dependent carrier emission out of the quantum well, after which transport through the continuum states can occur. Due to larger barriers in the In0.53Ga0.47As/In0.52Al0.48As system, this intrinsic limit to transport is much larger, and hence these devices are observed to be slower than their GaAs/AlxGa1-xAs counterparts.

引用

页码：1456 / 1458

页数：3

共 14 条

[1] CARRIER-INDUCED CHANGE IN REFRACTIVE-INDEX OF INP, GAAS, AND INGAASP [J].

BENNETT, BR ;

SOREF, RA ;

DELALAMO, JA .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1990, 26 (01) :113-122

[2] A MIXER BASED ELECTROOPTIC SAMPLING SYSTEM FOR SUBMILLIVOLT SIGNAL-DETECTION [J].

CHWALEK, JM ;

DYKAAR, DR .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1990, 61 (04) :1273-1276

[3] OPTICAL STUDIES OF PERPENDICULAR TRANSPORT IN SEMICONDUCTOR SUPERLATTICES [J].

DEVEAUD, B ;

SHAH, J ;

DAMEN, TC ;

LAMBERT, B ;

CHOMETTE, A ;

REGRENY, A .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1988, 24 (08) :1641-1651

[4] FAST ESCAPE OF PHOTOCREATED CARRIERS OUT OF SHALLOW QUANTUM-WELLS [J].

FELDMANN, J ;

GOOSSEN, KW ;

MILLER, DAB ;

FOX, AM ;

CUNNINGHAM, JE ;

JAN, WY .

APPLIED PHYSICS LETTERS, 1991, 59 (01) :66-68

[5] EXCITON SATURATION IN ELECTRICALLY BIASED QUANTUM-WELLS [J].

FOX, AM ;

MILLER, DAB ;

LIVESCU, G ;

CUNNINGHAM, JE ;

HENRY, JE ;

JAN, WY .

APPLIED PHYSICS LETTERS, 1990, 57 (22) :2315-2317

[6]

FOX AM, 1991, PICOSECOND ELECTRONI

[7]

GUPTA S, UNPUB

[8]

HOPFEL RA, 1986, APPL PHYS LETT, V48, P148, DOI 10.1063/1.96979

[9] TUNABLE SUPERLATTICE P-I-N PHOTODETECTORS - CHARACTERISTICS, THEORY, AND APPLICATIONS [J].

LARSSON, A ;

ANDREKSON, PA ;

ENG, ST ;

YARIV, A .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1988, 24 (05) :787-801

[10] ELECTRON-DRIFT VELOCITY-MEASUREMENT IN COMPOSITIONALLY GRADED ALXGA1-XAS BY TIME-RESOLVED OPTICAL PICOSECOND REFLECTIVITY [J].

LEVINE, BF ;

TSANG, WT ;

BETHEA, CG ;

CAPASSO, F .

APPLIED PHYSICS LETTERS, 1982, 41 (05) :470-472

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