EXCITONIC OPTICAL NONLINEARITY INDUCED BY INTERNAL FIELD SCREENING IN (211) ORIENTED STRAINED-LAYER SUPERLATTICES

被引：66

作者：

SELA, I ^{[1
]}

WATKINS, DE ^{[1
]}

LAURICH, BK ^{[1
]}

SMITH, DL ^{[1
]}

SUBBANNA, S ^{[1
]}

KROEMER, H ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,ECE,SANTA BARBARA,CA 93106

来源：

APPLIED PHYSICS LETTERS | 1991年 / 58卷 / 07期

关键词：

D O I：

10.1063/1.104568

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The nonlinear optical properties of a new class of strained-layer superlattices (intrinsic Stark effect superlattices) have been investigated. Specifically, we have compared the nonlinear transmission of Ga1-xIn(x)As-GaAs strained-layer superlattices grown along the (211) axis to identical superlattices grown along the (100) axis, and found that the optical nonlinearity in the (211) sample is about one order of magnitude greater than in the (100) sample. A blue shift of the exciton resonance and an increase in the exciton absorption strength in the (211) sample with increasing light intensity was observed (attributed to screening of the intrinsic Stark effect fields by photogenerated carriers), resulting in the stronger optical nonlinearity. The maximum of the nonlinear absorption index, \alpha-2\, in the (211) sample was 54 cm/W (\Im chi-3\ = 0.33 esu) whereas in the (100) sample the maximum of \alpha-2\ was 6.9 cm/W (\Im chi-3\ = 0.042 esu). The measured carrier recovery time in both samples was 2 ns.

引用

页码：684 / 686

页数：3

共 10 条

[1] ROOM-TEMPERATURE EXCITONIC NONLINEAR ABSORPTION AND REFRACTION IN GAAS/ALGAAS MULTIPLE QUANTUM WELL STRUCTURES [J].