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Design of subwavelength grating polarizers to generate cylindrical vector beams
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Paper Abstract

Subwavelength grating polarizers were designed to generate particular cylindrical vector beams. Based on the rigorous vector diffraction theory, the mechanism of the subwavelength gratings converting circularly polarized beam into cylindrical vector beams was analyzed. To obtain the particular type of cylindrical vector beam, a method of design of subwavelength grating polarizers was proposed and the designing procedures has been discussed. The basic function of the polarizer designed in this work is to convert the circularly polarized beam into radially/azimuthally polarized beam. By further improvement, the polarizer could generate complex cylindrical vector beams. Using the Richards-Wolf vectorial diffraction integral, the intensity distributions of the output focused beams from the polarizer were calculated. A phenomenon of divided focal spot was found in the vicinity of the geometrical focus point.

Paper Details

Date Published: 15 April 2019
PDF: 6 pages
Proc. SPIE 10819, Optical Metrology and Inspection for Industrial Applications V, 1081914 (15 April 2019); doi: 10.1117/12.2501236
Show Author Affiliations
Guozun Zhou, Northwestern Polytechnical Univ. (China)
Weijian Tian, Northwestern Polytechnical Univ. (China)
Yangtze Delta Region Institute of Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 10819:
Optical Metrology and Inspection for Industrial Applications V
Sen Han; Toru Yoshizawa; Song Zhang, Editor(s)

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