Many-body and correlation effects on parametric polariton amplification in semiconductor microcavities

被引：63

作者：

Savasta, S

Di Stefano, O

Girlanda, R

机构：

[1] Univ Messina, Ist Nazl Fis Mat, I-98166 Messina, Italy

[2] Univ Messina, Dipartimento Fis Mat & Tecnol Fis Avanzate, I-98166 Messina, Italy

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.90.096403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The complexity induced by the Coulomb interaction between electrons determines the noninstantaneous character of exciton-exciton collisions. We show that the exciton-photon coupling in semiconductor microcavities is able to alter the exciton dynamics during collisions strongly affecting the effective scattering rates. Our analysis clarifies the origin of the great enhancement of parametric gain observed when increasing the polariton splitting. It also demonstrates that exciton-exciton collisions in semiconductors can be controlled and engineered to produce almost decoherence-free collisions for the realization of all-optical microscopic devices.

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页数：4

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