Birefringent Phase Matching in Thin Rectangular High-Index-Contrast Waveguides

被引：32

作者：

Ishikawa, Hiroshi ^{[1
]}

Kondo, Takashi ^{[1
]}

机构：

[1] Univ Tokyo, Dept Mat Engn, Fac Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

APPLIED PHYSICS EXPRESS | 2009年 / 2卷 / 04期

关键词：

SECOND-HARMONIC GENERATION; 2ND-HARMONIC GENERATION; WAVEGUIDES;

D O I：

10.1143/APEX.2.042202

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a novel phase-matching scheme utilizing large structural birefringence in thin high-index-contrast waveguides. Large dispersions of high-index guiding materials are compensated by use of low-index cladding materials with small wavelength dispersions. The proposed birefringent phase-matching scheme is applicable to optically isotropic nonlinear optical materials. We show that phase-matched second-harmonic generation at 1.55 mu m in a rib-type AlGaAs/oxidized AlAs thin rectangular waveguide gives rise to a high normalized conversion efficiency of 19,000%/(W-cm(2)). This extremely high efficiency is achieved by strong field confinement and the use of the lowest-order transverse modes involved in the nonlinear interaction. (C) 2009 The Japan Society of Applied Physics

引用

页码：0422021 / 0422023

页数：3

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