Focusing Properties of Circularly Polarized Vortex Beam

2005 ◽  
Author(s):  
Qiwen Zhan
Keyword(s):  
Vortex Beam ◽  
Circularly Polarized ◽  
Focusing Properties

scholarly journals Longitudinal Component Properties of Circularly Polarized Terahertz Vortex Beams

2021 ◽  
Vol 9 ◽  
Author(s):  
Miao Wang ◽  
Xinke Wang ◽  
Peng Han ◽  
Wenfeng Sun ◽  
Shengfei Feng ◽  
...  
Keyword(s):  
Spot Size ◽  
Longitudinal Component ◽  
Transverse Component ◽  
Quarter Wave Plate ◽  
Phase Plate ◽  
Vortex Beam ◽  
Circularly Polarized ◽  
Left Hand ◽  
Quarter Wave ◽  
Focusing Properties

A circularly polarized vortex beam possesses similar focusing properties as a radially polarized beam. This type of beam is highly valuable for developing optical manufacturing technology, microscopy, and particle manipulation. In this work, a left-hand circularly polarized terahertz (THz) vortex beam (CPTVB) is generated by utilizing a THz quarter wave plate and a spiral phase plate. Focusing properties of its longitudinal component Ez are detailedly discussed on the simulation and experiment. With reducing the F-number of the THz beam and comparing with a transverse component Ex of a general circularly polarized THz beam, the simulation results show that the focal spot size and intensity of its Ez component can reach 87 and 50% of Ex under a same focusing condition. In addition, the experimental results still demonstrate that the left-hand CPTVB can always maintain fine Ez focusing properties in a broad bandwidth, which manifest the feasibility of this class of THz beams.

Tight-focusing properties of linearly polarized circular Airy Gaussian vortex beam

2020 ◽  
Vol 45 (2) ◽  
pp. 296 ◽  
Author(s):  
Jingli Zhuang ◽  
Liping Zhang ◽  
Dongmei Deng
Keyword(s):  
Vortex Beam ◽  
Tight Focusing ◽  
Linearly Polarized ◽  
Focusing Properties

Focusing Properties of Vortex Beam with an Axicon

2012 ◽  
Vol 49 (2) ◽  
pp. 022601
Author(s):  
刘晓云 Liu Xiaoyun ◽  
代雪峰 Dai Xuefeng ◽  
单丽艳 Shan Liyan ◽  
王楠 Wang Nan ◽  
徐送宁 Xu Songning
Keyword(s):  
Vortex Beam ◽  
Focusing Properties
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