Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal

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The conversion between polarization states upon reflection on the weakly corrugated interface between uniaxial crystals and isotropic media is studied by means of a model based on the Rayleigh hypothesis. We deal with sinusoidal gratings with the wave vector of the incident light being perpendicular...

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Autores principales: Depine, R.A., Gigli, M.L.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01631829_v49_n12_p8437_Depine
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01631829_v49_n12_p8437_Depine2023-10-03T15:01:43Z Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal Depine, R.A. Gigli, M.L. The conversion between polarization states upon reflection on the weakly corrugated interface between uniaxial crystals and isotropic media is studied by means of a model based on the Rayleigh hypothesis. We deal with sinusoidal gratings with the wave vector of the incident light being perpendicular to the grating grooves. Two situations are considered: (i) incidences from an isotropic, lossless dielectric onto a crystal and (ii) from a crystal onto a metal. The results show that in the first case total reflection plays an important role in polarization conversion, even for flat interfaces, where nearly 54% of s-to-p conversion can be attained, and that a weak corrugation can increase this value slightly. On the other hand, for metal-crystal interfaces illuminated under conditions of resonant excitation of surface plasmons, corrugation has a much stronger effect in the change of polarization of the incident wave. It is shown that the efficiency of conversion between ordinary and extraordinary modes can increase more than 250 times when the value of the groove height-to-period ratio is varied from 0 to 0.2. This effect is accompanied by a strong absorption in the metal and by narrow dips in the curves of copolarized efficiencies as functions of the angle of incidence. © 1994 The American Physical Society. Fil:Depine, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gigli, M.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01631829_v49_n12_p8437_Depine
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The conversion between polarization states upon reflection on the weakly corrugated interface between uniaxial crystals and isotropic media is studied by means of a model based on the Rayleigh hypothesis. We deal with sinusoidal gratings with the wave vector of the incident light being perpendicular to the grating grooves. Two situations are considered: (i) incidences from an isotropic, lossless dielectric onto a crystal and (ii) from a crystal onto a metal. The results show that in the first case total reflection plays an important role in polarization conversion, even for flat interfaces, where nearly 54% of s-to-p conversion can be attained, and that a weak corrugation can increase this value slightly. On the other hand, for metal-crystal interfaces illuminated under conditions of resonant excitation of surface plasmons, corrugation has a much stronger effect in the change of polarization of the incident wave. It is shown that the efficiency of conversion between ordinary and extraordinary modes can increase more than 250 times when the value of the groove height-to-period ratio is varied from 0 to 0.2. This effect is accompanied by a strong absorption in the metal and by narrow dips in the curves of copolarized efficiencies as functions of the angle of incidence. © 1994 The American Physical Society.
format JOUR
author Depine, R.A.
Gigli, M.L.
spellingShingle Depine, R.A.
Gigli, M.L.
Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
author_facet Depine, R.A.
Gigli, M.L.
author_sort Depine, R.A.
title Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
title_short Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
title_full Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
title_fullStr Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
title_full_unstemmed Conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
title_sort conversion between polarization states at the sinusoidal boundary of a uniaxial crystal
url http://hdl.handle.net/20.500.12110/paper_01631829_v49_n12_p8437_Depine
work_keys_str_mv AT depinera conversionbetweenpolarizationstatesatthesinusoidalboundaryofauniaxialcrystal
AT gigliml conversionbetweenpolarizationstatesatthesinusoidalboundaryofauniaxialcrystal
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