Distributed source model for the full-wave electromagnetic simulation of nonlinear terahertz generation

被引：16

作者：

Fumeaux, Christophe ^{[1
]}

Lin, Hungyen ^{[1
]}

Serita, Kazunori ^{[2
]}

Withayachumnankul, Withawat ^{[1
]}

Kaufmann, Thomas ^{[1
]}

Tonouchi, Masayoshi ^{[2
]}

Abbott, Derek ^{[1
]}

机构：

[1] Univ Adelaide, Sch Elect & Elect Engn, Adelaide, SA 5005, Australia

[2] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 16期

基金：

澳大利亚研究理事会;

关键词：

OPTICAL RECTIFICATION; TIME-DOMAIN; MAXWELL EQUATIONS; RADIATION; APERTURES; GUIDES; MICROSCOPE; MEDIA;

D O I：

10.1364/OE.20.018397

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The process of terahertz generation through optical rectification in a nonlinear crystal is modeled using discretized equivalent current sources. The equivalent terahertz sources are distributed in the active volume and computed based on a separately modeled near-infrared pump beam. This approach can be used to define an appropriate excitation for full-wave electromagnetic numerical simulations of the generated terahertz radiation. This enables predictive modeling of the near-field interactions of the terahertz beam with micro-structured samples, e. g. in a near-field time-resolved microscopy system. The distributed source model is described in detail, and an implementation in a particular full-wave simulation tool is presented. The numerical results are then validated through a series of measurements on square apertures. The general principle can be applied to other nonlinear processes with possible implementation in any full-wave numerical electromagnetic solver. (C) 2012 Optical Society of America

引用

页码：18397 / 18414

页数：18

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