Subwavelength micropolarizer in a gold film for visible light
Abstract
We have designed and fabricated a 100 μm x 100 μm four-sector binary subwavelength reflecting polarization microconverter in a gold film. Using finite-difference time-domain-aided numerical simulations and experiments, the micropolarizer was shown to convert an incident linearly polarized Gaussian beam of wavelength 532 nm into an azimuthally polarized beam. Conditions for generating on-axis regions of nonzero intensity when using propagating optical vortices with different initial polarization were deduced. By putting a spiral phase plate into an azimuthally polarized beam, the intensity pattern was shown to change from diffraction rings to a central peak.
Citation
Kotlyar , V V , Stafeev , S S , Kotlyar , M V , Nalimov , A G & O'Faolain , L 2016 , ' Subwavelength micropolarizer in a gold film for visible light ' , Applied Optics , vol. 55 , no. 19 , pp. 5025-5032 . https://doi.org/10.1364/AO.55.005025
Publication
Applied Optics
Status
Peer reviewed
ISSN
1559-128XType
Journal article
Description
Engineering and Physical Sciences Research Council (EPSRC) (EP/L017008/1); European Research Council (337508); Russian Foundation for Basic Research (RFBR) (14-07-97039, 14-29-07133, 15-07-01174, 15-37-20723, 16-07-00990, 16-29-11698); Ministry of Education and Science of the Russian Federation (MK-9019.2016.2).Collections
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