Journal
APPLIED PHYSICS LETTERS
Volume 79, Issue 11, Pages 1587-1589Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1401091
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We present a unique method for converting circularly polarized light into radially and azimuthally polarized beams. The method is based on the use of computer-generated space-variant subwavelength metal stripe gratings. The elements were realized on GaAs substrates and produced beams with high polarization purity at a wavelength of 10.6 mum. As a result of the conversion, the beams also undergo space-variant phase modification, which has an effect on their propagation. We demonstrate the effect experimentally, and calculate it using full space-variant polarization and phase analysis based on rigorous coupled-wave analysis and Jones calculus. (C) 2001 American Institute of Physics.
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