High power terahertz radiation with diamond photoconductive antenna array

被引：6

作者：

Yoneda, H ^{[1
]}

Tokuyama, K ^{[1
]}

Ueda, K ^{[1
]}

Yamamoto, H ^{[1
]}

Baba, K ^{[1
]}

机构：

[1] Univ Electrocommun, Inst Laser Sci, Chofu, Tokyo 1828585, Japan

来源：

2000 25TH INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES CONFERENCE DIGEST | 2000年

关键词：

D O I：

10.1109/ICIMW.2000.892937

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：

High power terahertz (THz) radiation was generated from photoconductive diamond switch array for the first time. This device consisted of more than 2000 photoconductive gaps and a binary mask for spatial modulation of pumping laser. Due to the high breakdown threshold of diamond and the over-coated gap structure for preventing surface flashover, high electric field strength (2x10(6)V/cm) can be applied on each gap with DC mode. A 10nJ, 1.5ps FWHM free propagating electro-magnetic pulse was observed from 10mm(2) effective emission area at E=10(5)V/cm. This radiation was focused on to 1.4mm phi spot with F/2 optics. As there was no severe saturation observed in photoconductive phenomena in CVD diamond up to 10(6)V/cm, the focusing intensity can be increased to GW/cm(2) level by increasing the applied electric field and the switching area.

引用

页码：61 / 62

页数：2

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