SPONTANEOUS EMISSION OF EXCITONS IN GAAS QUANTUM-WELLS - THE ROLE OF MOMENTUM SCATTERING

被引：123

作者：

WANG, HL ^{[1
]}

SHAH, J ^{[1
]}

DAMEN, TC ^{[1
]}

PFEIFFER, LN ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.74.3065

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Resonantly excited photoluminescence with femtosecond time resolution reveals the essential role of momentum scattering in emission from excitons in quasi-two-dimensional systems. The gradual rise of the luminescence provides a direct measure of exciton momentum scattering rates. An analysis of quantum beats in the luminescence determines exciton dephasing rates. The results show that the momentum scattering rate is considerably larger than the dephasing rate, indicating a breakdown of the impact approximation commonly assumed in coherent optical studies. © 1995 The American Physical Society.

引用

页码：3065 / 3068

页数：4

共 25 条

[1]

AGRANOVI.VM, 1966, JETP LETT-USSR, V3, P223

[2]

Andreani L. C., 1994, CONFINED ELECTRONS P

[3] RADIATIVE LIFETIME OF FREE-EXCITONS IN QUANTUM-WELLS [J].

ANDREANI, LC ;

TASSONE, F ;

BASSANI, F .

SOLID STATE COMMUNICATIONS, 1991, 77 (09) :641-645

[4]

[Anonymous], 1983, QUANTUM THEORY LIGHT

[5] EFFECTS OF COLLISIONS ON LINEAR AND NONLINEAR SPECTROSCOPIC LINE-SHAPES [J].

BERMAN, PR .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1978, 43 (03) :101-149

[6]

Citrin D. S., 1993, Comments on Condensed Matter Physics, V16, P263

[7] ENHANCED RADIATIVE RECOMBINATION OF FREE-EXCITONS IN GAAS QUANTUM-WELLS [J].

DEVEAUD, B ;

CLEROT, F ;

ROY, N ;

SATZKE, K ;

SERMAGE, B ;

KATZER, DS .

PHYSICAL REVIEW LETTERS, 1991, 67 (17) :2355-2358

[8] EXCITON DYNAMICS IN A GAAS QUANTUM-WELL [J].

ECCLESTON, R ;

STROBEL, R ;

RUHLE, WW ;

KUHL, J ;

FEUERBACHER, BF ;

PLOOG, K .

PHYSICAL REVIEW B, 1991, 44 (03) :1395-1398

[9]

FELDMANN J, 1987, PHYS REV LETT, V59, P2377

[10] RAPID RADIATIVE DECAY AND ENHANCED OPTICAL NONLINEARITY OF EXCITONS IN A QUANTUM WELL [J].

HANAMURA, E .

PHYSICAL REVIEW B, 1988, 38 (02) :1228-1234

← 1 2 3 →