Enhanced terahertz emission from ZnSe nano-grain surface

被引：14

作者：

He, Shan ^{[1
]}

Chen, Xiaoshu ^{[1
]}

Wu, Xiaojun ^{[1
]}

Wang, Gang ^{[1
]}

Zhao, Fuli ^{[1
]}

机构：

[1] Sun Yat sen Univ, Sch Chem & Chem Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2008年 / 26卷 / 9-12期

基金：

中国国家自然科学基金;

关键词：

nano-grain; optical rectification; surface field enhancement; terahertz (THz) emission; ZnSe;

D O I：

10.1109/JLT.2008.923217

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

ZnSe(111). nano-grain surface is fabricated by the femtosecond laser ablation technology and is applied for terahertz (THz) generation. Compared with bare ZnSe surface, this nano-grain surface can improve THz emission properties. The power of THz radiation from ZnSe nano-grain surface is about twice as large as that from bare surface at optical rectification range. This enhancement can be attributed to the local field enhancement of the ZnSe nano-grain surface. The primary field enhancement mechanism is the macroscopic local-field enhancement which includes both of the lightning-rod effect and the local-plasmon effect.

引用

页码：1519 / 1523

页数：5

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