Terahertz vector beam generation using segmented nonlinear optical crystals with threefold rotational symmetry

被引：73

作者：

Imai, Ryo ^{[1
]}

Kanda, Natsuki ^{[1
,2
]}

Higuchi, Takuya ^{[1
,2
]}

Zheng, Zhu ^{[1
,2
]}

Konishi, Kuniaki ^{[2
,3
]}

Kuwata-Gonokami, Makoto ^{[2
,3
,4
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] JST, Core Res Evolut Sci & Technol CREST, Tokyo 1138656, Japan

[3] Univ Tokyo, Photon Sci Ctr, Tokyo 1138656, Japan

[4] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 20期

关键词：

RECTIFICATION; POLARIZATION; RADIATION; LIGHT;

D O I：

10.1364/OE.20.021896

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and demonstrate a simple method for cylindrical vector beam generation in the terahertz frequency region using optical rectification in segmented nonlinear crystals with threefold rotational symmetry. We used segmented GaP(111) plates to generate the terahertz cylindrical vector beam, and obtained clear evidence of the beam generation with a terahertz camera. By this method, a broadband terahertz cylindrical vector beam can be generated, and the radial and azimuth modes can be easily switched. We also report on the direct observation of the longitudinal electric field components at the focal point using a terahertz time-domain spectroscopy technique. (C) 2012 Optical Society of America

引用

页码：21896 / 21904

页数：9

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