19 March 2015 Four-zone reflective polarization conversion plate
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Binary diffraction optical element was designed for polarization conversion from linear to radial. A grating period was equal to 400 nm, a relief height was equal to 110 nm. Simulation by FDTD method and Rayleight-Zommerfeld integral shown that there are radial polarized light beam in the far field with smooth angle dependence on the beam circle observation position. It was shown experimentally, that a gaussian laser beam with wavelength of 633 nm reflected from the polarization conversion plate contain a radially polarized light.
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A. G. Nalimov, A. G. Nalimov, S. S. Stafeev, S. S. Stafeev, L. O'Faolain, L. O'Faolain, V. V. Kotlyar, V. V. Kotlyar, } "Four-zone reflective polarization conversion plate", Proc. SPIE 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics, 94482E (19 March 2015); doi: 10.1117/12.2180028; https://doi.org/10.1117/12.2180028

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