DOUBLY RESONANT 2ND-HARMONIC GENERATION OF 2.0 MU-M LIGHT IN COUPLED INGAAS ALAS QUANTUM-WELLS

被引：14

作者：

CHUI, HC ^{[1
]}

MARTINET, EL ^{[1
]}

WOODS, GL ^{[1
]}

FEJER, MM ^{[1
]}

HARRIS, JS ^{[1
]}

RELLA, CA ^{[1
]}

RICHMAN, BI ^{[1
]}

SCHWETTMAN, HA ^{[1
]}

机构：

[1] STANFORD UNIV,STANFORD PICOSECOND FEL CTR,WW HANSEN EXPTL PHYS LAB,STANFORD,CA 94305

来源：

APPLIED PHYSICS LETTERS | 1994年 / 64卷 / 25期

关键词：

D O I：

10.1063/1.111276

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate intersubband absorption and second harmonic generation (SHG) in asymmetric coupled In0.6Ga0.4As/AlAs n-type quantum wells (QWs) grown on a GaAs substrate. Intersubband absorption at 4.1 and 2.1 mum wavelengths, corresponding to the 1 to 2 and 1 to 3 transitions, respectively, are observed. SHG of 2.0 mum light is demonstrated in this doubly resonant QW. This is the shortest wavelength SHG to date in any n-type QW system. The second order nonlinear susceptibility chi(2) is measured using a free electron laser by interference of the second harmonic fields from the QW and substrate. At a pump wavelength of 4.0 mum, a large asymmetry in the SHG power with rotation angle of the sample arising from SHG from the QW is observed, and a chi(2) of magnitude 20+/-8 nm/V, approximately 100 times that of bulk GaAs, and phase 63-degrees+/-34-degrees relative to the GaAs substrate is measured. Comparison of both the linear and nonlinear properties to a simple model is discussed.

引用

页码：3365 / 3367

页数：3

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