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Proceedings Paper

Tight focusing of laser light propagated through subwavelength micropolarizer using Fresnel zone plate
Author(s): Sergey S. Stafeev; Anton G. Nalimov; Liam O'Faolain; Maria V. Kotlyar; Victor V. Kotlyar
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Paper Abstract

We discuss a four-Sector transmission Polarization Converter that enables the conversion of linearly polarized incident light into an azimuthally polarized beam. The resulting azimuthally polarized beam is characterized by a phase shift of π between the diametrically opposite beam points. Using scanning near-field optical microscope we experimentally show that by placing a Fresnel zone plate of focus 532 nm behind the four-sector micropolarizer, light can be focused into a subwavelength focal spot with smaller and larger sizes measuring FWHM = 0.46λ and FWHM = 0.57λ Numerically obtained focal spot of the transverse E-field component, which is measured by our scanning near-field optical microscope, has diameters FWHMx = 0.42λ and FWHMy = 0.59λ.

Paper Details

Date Published: 6 April 2017
PDF: 8 pages
Proc. SPIE 10342, Optical Technologies for Telecommunications 2016, 103420R (6 April 2017); doi: 10.1117/12.2270655
Show Author Affiliations
Sergey S. Stafeev, Image Processing Systems Institute (Russian Federation)
Samara National Research Univ. (Russian Federation)
Anton G. Nalimov, Image Processing Systems Institute (Russian Federation)
Samara National Research Univ. (Russian Federation)
Liam O'Faolain, Univ. of St. Andrews (United Kingdom)
Maria V. Kotlyar, Samara National Research Univ. (Russian Federation)
Victor V. Kotlyar, Image Processing Systems Institute (Russian Federation)
Samara National Research Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 10342:
Optical Technologies for Telecommunications 2016
Vladimir A. Andreev; Anton V. Bourdine; Vladimir A. Burdin; Oleg G. Morozov; Albert H. Sultanov, Editor(s)

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