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Physical and encoded Q-plates for the generation of switchable vector beams
Author(s): Ignacio Moreno; María del Mar Sánchez-López; Jeffrey A. Davis; Katherine Badham; Sam W. Delaney; Don M. Cottrell; Nobuyuki Hashimotono; Ayano Tanabe; Makoto Kurihara
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Paper Abstract

In this work we report on our achievements in generating switchable and arbitrary vector beams by means of q-plates. Two kind of q-plates are considered: i) a physical prototype from Citizen Co. and ii) a virtual device that is encoded onto a spatial light modulator (SLM). In both cases experimental and analytical results within the Jones formalism are shown. The performance of a segmented and tunable liquid crystal q-plate prototype is characterized at visible and telecommunications wavelengths, and the generation of first-order vector beams is probed. By using a reflective geometry and tuning the q-plate at half-wave or at quarter-wave retardance, it is shown how the device can operate either as a q-plate with double order. Finally, we show the generation of arbitrary programmable integer and fractional vector beams by encoding a q-plate onto a SLM based system. The system is based on a double-pass configuration that consecutively modulates the vertical and the horizontal polarization components of light using a transmissive LCoS display. Therefore, new and exotic q-plate designs can be analyzed prior to their fabrication.

Paper Details

Date Published: 27 September 2016
PDF: 9 pages
Proc. SPIE 9950, Laser Beam Shaping XVII, 99500L (27 September 2016); doi: 10.1117/12.2237383
Show Author Affiliations
Ignacio Moreno, Univ. Miguel Hernández de Elche (Spain)
María del Mar Sánchez-López, Univ. Miguel Hernández de Elche (Spain)
Jeffrey A. Davis, San Diego State Univ. (United States)
Katherine Badham, San Diego State Univ. (United States)
Sam W. Delaney, San Diego State Univ. (United States)
Don M. Cottrell, San Diego State Univ. (United States)
Nobuyuki Hashimotono, Citizen Holdings Co., Ltd. (Japan)
Ayano Tanabe, Citizen Holdings Co., Ltd. (Japan)
Makoto Kurihara, Citizen Holdings Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 9950:
Laser Beam Shaping XVII
Andrew Forbes; Todd E. Lizotte, Editor(s)

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