FEMTOSECOND DYNAMICS OF EXCITONS UNDER EXTREME MAGNETIC CONFINEMENT

被引：62

作者：

STARK, JB

KNOX, WH

CHEMLA, DS

SCHAFER, W

SCHMITTRINK, S

STAFFORD, C

机构：

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

[2] MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.65.3033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The resonant optical nonlinearities of GaAs/AlGaAs quantum wells are measured with femtosecond time resolution, as the quasi-two-dimensional states are further confined into quasizero dimensions by a perpendicular magnetic field. We apply fields up to 12 T to demonstrate that exciton-exciton Coulomb interactions are strongly modified by quasi-zero dimensional confinement, in agreement with many-body theory. These measurements demonstrate for the first time the remarkable result that at high magnetic fields an ensemble of 1s, electron-hole pairs behaves like a gas of noninteracting particles. © 1990 The American Physical Society.

引用

收藏

页码：3033 / 3036

页数：4

相关论文

共 17 条

[1] INTERBAND OPTICAL TRANSITIONS IN EXTREMELY ANISOTROPIC SEMICONDUCTORS .2. COEXISTENCE OF EXCITON AND LANDAU LEVELS [J].

AKIMOTO, O ;

HASEGAWA, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1967, 22 (01) :181-&

[2] ELECTRON-HOLE MAGNETOPLASMAS IN QUANTUM WELLS [J].

BAUER, GEW .

PHYSICAL REVIEW LETTERS, 1990, 64 (01) :60-63

[3] DYNAMICS OF SPECTRAL HOLE BURNING [J].

CRUZ, CHB ;

GORDON, JP ;

BECKER, PC ;

FORK, RL ;

SHANK, CV .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1988, 24 (02) :261-266

[4] EXCITONIC VERSUS PLASMA SCREENING IN HIGHLY EXCITED GALLIUM-ARSENIDE [J].

FEHRENBACH, GW ;

SCHAFER, W ;

ULBRICH, RG .

JOURNAL OF LUMINESCENCE, 1985, 30 (1-4) :154-161

[5] FEMTOSECOND STUDIES OF COHERENT TRANSIENTS IN SEMICONDUCTORS [J].

FLUEGEL, B ;

PEYGHAMBARIAN, N ;

OLBRIGHT, G ;

LINDBERG, M ;

KOCH, SW ;

JOFFRE, M ;

HULIN, D ;

MIGUS, A ;

ANTONETTI, A .

PHYSICAL REVIEW LETTERS, 1987, 59 (22) :2588-2591

[6] FEMTOSECOND DYNAMICS OF RESONANTLY EXCITED EXCITONS IN ROOM-TEMPERATURE GAAS QUANTUM WELLS [J].

KNOX, WH ;

FORK, RL ;

DOWNER, MC ;

MILLER, DAB ;

CHEMLA, DS ;

SHANK, CV ;

GOSSARD, AC ;

WIEGMANN, W .

PHYSICAL REVIEW LETTERS, 1985, 54 (12) :1306-1309

[7] GENERATION AND KILOHERTZ-RATE AMPLIFICATION OF FEMTOSECOND OPTICAL PULSES AROUND 800-NM [J].

KNOX, WH .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1987, 4 (11) :1771-1776

[8]

LERNER IV, 1981, ZH EKSP TEOR FIZ, V53, P763

[9] HYDROGENIC ENERGY-LEVELS IN 2 DIMENSIONS AT ARBITRARY MAGNETIC-FIELDS [J].

MACDONALD, AH ;

RITCHIE, DS .

PHYSICAL REVIEW B, 1986, 33 (12) :8336-8344

[10] TWO-DIMENSIONAL ELECTRON-HOLE FLUID IN A STRONG PERPENDICULAR MAGNETIC-FIELD - EXCITON BOSE CONDENSATE OR MAXIMUM DENSITY TWO-DIMENSIONAL DROPLET [J].

PAQUET, D ;

RICE, TM ;

UEDA, K .

PHYSICAL REVIEW B, 1985, 32 (08) :5208-5221