Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity

Using Jones matrices and vectors, we show that an optical metasurface composed of a set of subwavelength binary diffraction gratings and characterized by an anisotropic transmittance described by a polarization rotation matrix by the angle mφ, where φ is the polar angle, forms an m-th order azimutha...

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Main Authors:	Victor Kotlyar, Anton Nalimov, Sergey Stafeev
Format:	Article
Language:	English
Published:	Samara National Research University 2019-04-01
Series:	Компьютерная оптика
Subjects:	optical vortex polarization backward flux metalens
Online Access:	http://computeroptics.ru/KO/PDF/KO43-2/430203.pdf

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record_format	Article
spelling	doaj-9781bcd5487c4bcfa472e280473bdd892020-11-25T01:20:32ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792019-04-0143217418310.18287/2412-6179-2019-43-2-174-183Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularityVictor Kotlyar0Anton Nalimov1Sergey Stafeev2IPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, Samara, Russia, Samara National Research University, Moskovskoye shosse, 34, Samara, RussiaIPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, Samara, Russia, Samara National Research University, Moskovskoye shosse, 34, Samara, RussiaIPSI RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, Samara, Russia, Samara National Research University, Moskovskoye shosse, 34, Samara, RussiaUsing Jones matrices and vectors, we show that an optical metasurface composed of a set of subwavelength binary diffraction gratings and characterized by an anisotropic transmittance described by a polarization rotation matrix by the angle mφ, where φ is the polar angle, forms an m-th order azimuthally or radially polarized beam when illuminated by linearly polarized light, generating an optical vortex with the topological charge m upon illumination by circularly polarized light. Such a polarization-phase converter (PPC) performs a spin-orbit transformation, similar to that performed by liquid-crystal q-plates. Using a FDTD method, it is numerically shown that when illuminating the PPC by a uniformly (linearly or circularly) polarized field with topological charge m = 2 and then focusing the output beam with a binary zone plate, a reverse on-axis light flow is formed, being comparable in magnitude with the direct optical flow. Moreover, the reverse flows obtained when focusing the circularly polarized optical vortex with the topological charge m = 2 and the second-order polarization vortex are shown to be the same in magnitude.http://computeroptics.ru/KO/PDF/KO43-2/430203.pdfoptical vortexpolarizationbackward fluxmetalens
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Victor Kotlyar Anton Nalimov Sergey Stafeev
spellingShingle	Victor Kotlyar Anton Nalimov Sergey Stafeev Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity Компьютерная оптика optical vortex polarization backward flux metalens
author_facet	Victor Kotlyar Anton Nalimov Sergey Stafeev
author_sort	Victor Kotlyar
title	Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
title_short	Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
title_full	Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
title_fullStr	Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
title_full_unstemmed	Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
title_sort	comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity
publisher	Samara National Research University
series	Компьютерная оптика
issn	0134-2452 2412-6179
publishDate	2019-04-01
description	Using Jones matrices and vectors, we show that an optical metasurface composed of a set of subwavelength binary diffraction gratings and characterized by an anisotropic transmittance described by a polarization rotation matrix by the angle mφ, where φ is the polar angle, forms an m-th order azimuthally or radially polarized beam when illuminated by linearly polarized light, generating an optical vortex with the topological charge m upon illumination by circularly polarized light. Such a polarization-phase converter (PPC) performs a spin-orbit transformation, similar to that performed by liquid-crystal q-plates. Using a FDTD method, it is numerically shown that when illuminating the PPC by a uniformly (linearly or circularly) polarized field with topological charge m = 2 and then focusing the output beam with a binary zone plate, a reverse on-axis light flow is formed, being comparable in magnitude with the direct optical flow. Moreover, the reverse flows obtained when focusing the circularly polarized optical vortex with the topological charge m = 2 and the second-order polarization vortex are shown to be the same in magnitude.
topic	optical vortex polarization backward flux metalens
url	http://computeroptics.ru/KO/PDF/KO43-2/430203.pdf
work_keys_str_mv	AT victorkotlyar comparisonofbackwardflowvaluesinthesharpfocusoflightfieldswithpolarizationandphasesingularity AT antonnalimov comparisonofbackwardflowvaluesinthesharpfocusoflightfieldswithpolarizationandphasesingularity AT sergeystafeev comparisonofbackwardflowvaluesinthesharpfocusoflightfieldswithpolarizationandphasesingularity
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Comparison of backward flow values in the sharp focus of light fields with polarization and phase singularity

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