Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate

被引：96

作者：

Miyamoto, K. ^{[1
]}

Suizu, K. ^{[2
]}

Akiba, T. ^{[2
]}

Omatsu, T. ^{[1
,3
]}

机构：

[1] Chiba Univ, Grad Sch Adv Integrat Sci, Inage Ku, Chiba 2638522, Japan

[2] Chiba Inst Technol, Dept Elect Elect & Comp Engn, Narashino, Chiba 2750016, Japan

[3] CREST Japan Sci & Technol Agcy, Chiyoda Ku, Tokyo 1020075, Japan

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 26期

关键词：

OPTICAL VORTEX; LIGHT;

D O I：

10.1063/1.4886407

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A terahertz (THz) spiral phase plate with high transmission (>90% after Fresnel correction) and low dispersion has been developed based on the Tsurupica olefin polymer. Direct observations of the topological charge (both magnitude and sign) of a THz vortex beam are performed by using a THz camera with tilted lens focusing and radial defect introduction. The vortex outputs with a topological charge of +/- 1 (or +/- 2) are obtained at a frequency of 2 (or 4) THz. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

引用

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