Coherent secondary emission from resonantly excited two-exciton states: An intrinsic phenomenon

被引：7

作者：

Birkedal, D

Shah, J

Pfeiffer, LN

机构：

[1] Bell Labs, Lucent Technol, Holmdel, NJ 07733 USA

[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.60.15585

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the observation of coherent secondary emission from resonantly excited bound and unbound two-exciton states in quantum wells. The emission is intrinsic, in contrast to the well-known Rayleigh scattering from excitons that requires disorder. We measure the spectral amplitude and the phase (and, hence, the femtosecond dynamics) of this coherent emission using ultrafast spectral interferometry, and obtain direct information on the contributions to the nonlinear susceptibility from exciton-exciton correlations beyond the mean-field approximation. [S0163-1829(99)-2].

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页码：15585 / 15588

页数：4

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