Generation of terahertz hollow beams by a photonic quasi-crystal flat lens

被引：24

作者：

Feng, Bo ^{[1
]}

Liu, Exian ^{[1
]}

Wang, Ziming ^{[1
]}

Cai, Weicheng ^{[1
]}

Liu, Hongfei ^{[1
]}

Wang, Shuo ^{[1
]}

Liang, Taiyuan ^{[1
]}

Xiao, Wei ^{[1
]}

Liu, Jianjun ^{[1
,2
]}

机构：

[1] Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micro Nanooptoelect Devices, Changsha 410082, Hunan, Peoples R China

[2] Univ Buffalo SUNY, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA

来源：

APPLIED PHYSICS EXPRESS | 2016年 / 9卷 / 06期

基金：

中国国家自然科学基金;

关键词：

GAUSSIAN BEAMS; LASER-BEAMS; WAVE; TURBULENCE; QUALITY; LIGHT;

D O I：

10.7567/APEX.9.062003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have designed a decagonal photonic quasi-crystal (PQC) flat lens, which turns an incident terahertz (THz) plane wave into a hollow beam easily and flexibly. The features of the THz hollow beam can be controlled by varying the parameters of a point defect in the center of the lens, i.e., the PQC flat lens can be used as a flexible tool for THz optical captivity or optical tweezer. The results showing that an airy disk, whose mean beam width is similar to the incident wavelength and power-in-the-bucket (PIB) is more than 96%, can be generated in the far field. (C) 2016 The Japan Society of Applied Physics

引用

页数：3

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