ENHANCED ENERGY AND PHASE RELAXATION OF EXCITONS IN THE PRESENCE OF BARE ELECTRONS

被引：35

作者：

KOCH, M

HELLMANN, R

BASTIAN, G

FELDMANN, J

GOBEL, EO

DAWSON, P

机构：

[1] UNIV MARBURG,ZENTRUM MAT WISSENSCH,D-35032 MARBURG,GERMANY

[2] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT PURE & APPL PHYS,MANCHESTER M60 1QD,LANCS,ENGLAND

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.51.13887

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using transient four-wave-mixing and time-resolved photoluminescence experiments we investigate the influence of bare electrons on the phase and energy relaxation of excitons in a mixed type-Itype-II GaAs/AlAs double-quantum-well structure. We find that exciton-electron scattering is twice as efficient as exciton-exciton scattering. As a consequence, the rates for exciton formation and for energy relaxation of free excitons to K0 are enhanced. Additionally, localized excitons become mobile in the presence of bare electrons leading to a more complete relaxation of excitons into the energetically lowest quantum-well states. © 1995 The American Physical Society.

引用

收藏

页码：13887 / 13890

页数：4

相关论文

共 25 条

[1]

ASHKINADZE BM, 1993, SEMICONDUCTORS+, V27, P1073

[2] FEMTOSECOND PHOTON-ECHOES FROM BAND-TO-BAND TRANSITIONS IN GAAS [J].

BECKER, PC ;

FRAGNITO, HL ;

CRUZ, CHB ;

FORK, RL ;

CUNNINGHAM, JE ;

HENRY, JE ;

SHANK, CV .

PHYSICAL REVIEW LETTERS, 1988, 61 (14) :1647-1649

[3] 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

[4] LOW-POWER, ALL-OPTICAL NONLINEAR ABSORPTION IN ASYMMETRIC DOUBLE QUANTUM-WELLS [J].

DAWSON, P ;

GALBRAITH, I ;

KUCHARSKA, AI ;

FOXON, CT .

APPLIED PHYSICS LETTERS, 1991, 58 (25) :2889-2891

[5] SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN TYPE-II GAAS/ALAS SUPERLATTICES [J].

FELDMANN, J ;

SATTMANN, R ;

GOBEL, EO ;

KUHL, J ;

HEBLING, J ;

PLOOG, K ;

MURALIDHARAN, R ;

DAWSON, P ;

FOXON, CT .

PHYSICAL REVIEW LETTERS, 1989, 62 (16) :1892-1895

[6] GAMMA-X-GAMMA ELECTRON-TRANSFER IN MIXED TYPE-I TYPE-II GAAS/ALAS QUANTUM-WELL STRUCTURES [J].

FELDMANN, J ;

PREIS, M ;

GOBEL, EO ;

DAWSON, P ;

FOXON, CT ;

GALBRAITH, I .

SOLID STATE COMMUNICATIONS, 1992, 83 (03) :245-248

[7] OPTICAL NONLINEARITIES IN MIXED TYPE-I-TYPE-II GAAS/ALAS MULTIPLE QUANTUM-WELLS [J].

GALBRAITH, I ;

DAWSON, P ;

FOXON, CT .

PHYSICAL REVIEW B, 1992, 45 (23) :13499-13508

[8] QUANTUM BEATS OF EXCITONS IN QUANTUM-WELLS [J].

GOBEL, EO ;

LEO, K ;

DAMEN, TC ;

SHAH, J ;

SCHMITTRINK, S ;

SCHAFER, W ;

MULLER, JF ;

KOHLER, K .

PHYSICAL REVIEW LETTERS, 1990, 64 (15) :1801-1804

[9] PHASE-TRANSITIONS FOR ELECTRONIC EXCITATIONS IN SEMICONDUCTORS [J].

HAUG, H .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1976, 24 (04) :351-360

[10] OBSERVATION OF SINGLE-OPTICAL-PHONON EMISSION [J].

HEIBLUM, M ;

GALBI, D ;

WECKWERTH, M .

PHYSICAL REVIEW LETTERS, 1989, 62 (09) :1057-1060