27 September 2016 Physical and encoded Q-plates for the generation of switchable vector beams
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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.
Conference Presentation
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Ignacio Moreno, Ignacio Moreno, María del Mar Sánchez-López, María del Mar Sánchez-López, Jeffrey A. Davis, Jeffrey A. Davis, Katherine Badham, Katherine Badham, Sam W. Delaney, Sam W. Delaney, Don M. Cottrell, Don M. Cottrell, Nobuyuki Hashimoto, Nobuyuki Hashimoto, Ayano Tanabe, Ayano Tanabe, Makoto Kurihara, Makoto Kurihara, } "Physical and encoded Q-plates for the generation of switchable vector beams", Proc. SPIE 9950, Laser Beam Shaping XVII, 99500L (27 September 2016); doi: 10.1117/12.2237383; https://doi.org/10.1117/12.2237383
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