Charged exciton dynamics in GaAs quantum wells

被引：90

作者：

Finkelstein, G ^{[1
]}

Umansky, V

Bar-Joseph, I

Ciulin, V

Haacke, S

Ganiere, JD

Deveaud, B

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

[2] Swiss Fed Inst Technol, Dept Phys, Inst Micro & Optoelect, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.58.12637

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the dynamics of the charged and neutral excitons in a modulation-doped GaAs quantum well by time-resolved photoluminescence under a resonant excitation. The radiative lifetime of the charged exciton is found to be surprisingly short, 60 ps. This time is temperature independent between 2 and 10 K, and increases by a factor of 2 at 6 T. We discuss our findings in view of present theories of exciton radiative decay. [S0163-1829(98)03143-9].

引用

页码：12637 / 12640

页数：4

共 18 条

[1]

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

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

ANDREANI, LC ;

TASSONE, F ;

BASSANI, F .

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

[3] ELECTRON-CONCENTRATION-DEPENDENT QUANTUM-WELL LUMINESCENCE - EVIDENCE FOR A NEGATIVELY CHARGED EXCITON [J].

BUHMANN, H ;

MANSOURI, L ;

WANG, J ;

BETON, PH ;

MORI, N ;

EAVES, L ;

HENINI, M ;

POTEMSKI, M .

PHYSICAL REVIEW B, 1995, 51 (12) :7969-7972

[4] RADIATIVE LIFETIMES OF EXCITONS IN QUANTUM-WELLS - LOCALIZATION AND PHASE-COHERENCE EFFECTS [J].

CITRIN, DS .

PHYSICAL REVIEW B, 1993, 47 (07) :3832-3841

[5] DYNAMICS OF EXCITON FORMATION AND RELAXATION IN GAAS QUANTUM-WELLS [J].

DAMEN, TC ;

SHAH, J ;

OBERLI, DY ;

CHEMLA, DS ;

CUNNINGHAM, JE ;

KUO, JM .

PHYSICAL REVIEW B, 1990, 42 (12) :7434-7438

[6] 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

[7] Near-field spectroscopy of a gated electron gas: A direct evidence for electron localization [J].

Eytan, G ;

Yayon, Y ;

Rappaport, M ;

Shtrikman, H ;

Bar-Joseph, I .

PHYSICAL REVIEW LETTERS, 1998, 81 (08) :1666-1669

[8] Negatively and positively charged excitons in GaAs/AlxGa1-xAs quantum wells [J].

Finkelstein, G ;

Shtrikman, H ;

BarJoseph, I .

PHYSICAL REVIEW B, 1996, 53 (04) :R1709-R1712

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

HANAMURA, E .

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

[10] EXCITON DYNAMICS OF GAAS/ALXGA1-XAS DOPED QUANTUM-WELLS [J].

HARRIS, CI ;

MONEMAR, B ;

KALT, H ;

HOLTZ, PO ;

SUNDARAM, M ;

MERX, JL ;

GOSSARD, AC .

PHYSICAL REVIEW B, 1994, 50 (24) :18367-18374

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