Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate
Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate
复制标题
DOI：
10.1063/1.4886407
复制
发表时间：
2014-06-30
影响因子：
4
通讯作者：
Omatsu, T.
中科院分区：
文献类型：
--
作者：
Miyamoto, K.;Suizu, K.;Omatsu, T.
以鹤玉（Tsurupica）烯烃聚合物为基片，研制了一种高透过率（菲涅耳校正后>90%）、低色散的太赫兹螺旋相位板。利用倾斜透镜聚焦和引入径向缺陷的太赫兹照相机，对太赫兹涡旋光束的拓扑荷（幅度和符号）进行了直接观测。在2（或4）THz的频率下获得了拓扑荷为+/-1（或+/-2）的涡旋输出。(C)2014年作者。除非另有说明，否则所有文章内容均根据Creative Commons Attribution 3.0 Unported License许可。
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.