Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au

Abstract Hybridization of semiconductor nanostructures with asymmetric metallic layers offers new paths to circular polarization control and chiral properties. Here we study, both experimentally and numerically, chiral properties of GaAs-based nanowires (NWs) which have two out of six sidewalls cove...

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Autores principales:	Emilija Petronijevic, Alessandro Belardini, Grigore Leahu, Teemu Hakkarainen, Marcelo Rizzo Piton, Eero Koivusalo, Concita Sibilia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e77d0d3d16d54092a33db82472976cb0
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spelling	oai:doaj.org-article:e77d0d3d16d54092a33db82472976cb02021-12-02T16:23:19ZBroadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au10.1038/s41598-021-83899-22045-2322https://doaj.org/article/e77d0d3d16d54092a33db82472976cb02021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83899-2https://doaj.org/toc/2045-2322Abstract Hybridization of semiconductor nanostructures with asymmetric metallic layers offers new paths to circular polarization control and chiral properties. Here we study, both experimentally and numerically, chiral properties of GaAs-based nanowires (NWs) which have two out of six sidewalls covered by Au. Sparse ensembles of vertical, free-standing NWs were fabricated by means of lithography-free self-assembled technique on Si substrates and subsequently covered by Au using tilted evaporation. We report on optical spin-dependent specular reflection in the 680–1000 nm spectral range when the orientation of the golden layers follows the rule of extrinsic chirality. The analysis shows reflection peaks of the chiral medium whose intensity is dependent on the light handedness. We further propose a novel, time-efficient numerical method that enables a better insight into the far-field intensity and distribution of the scattered light from a sparse NW ensembles. The measurements done on three different samples in various orientations show good agreement with theoretical predictions over a broad wavelength range.Emilija PetronijevicAlessandro BelardiniGrigore LeahuTeemu HakkarainenMarcelo Rizzo PitonEero KoivusaloConcita SibiliaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Emilija Petronijevic Alessandro Belardini Grigore Leahu Teemu Hakkarainen Marcelo Rizzo Piton Eero Koivusalo Concita Sibilia Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
description	Abstract Hybridization of semiconductor nanostructures with asymmetric metallic layers offers new paths to circular polarization control and chiral properties. Here we study, both experimentally and numerically, chiral properties of GaAs-based nanowires (NWs) which have two out of six sidewalls covered by Au. Sparse ensembles of vertical, free-standing NWs were fabricated by means of lithography-free self-assembled technique on Si substrates and subsequently covered by Au using tilted evaporation. We report on optical spin-dependent specular reflection in the 680–1000 nm spectral range when the orientation of the golden layers follows the rule of extrinsic chirality. The analysis shows reflection peaks of the chiral medium whose intensity is dependent on the light handedness. We further propose a novel, time-efficient numerical method that enables a better insight into the far-field intensity and distribution of the scattered light from a sparse NW ensembles. The measurements done on three different samples in various orientations show good agreement with theoretical predictions over a broad wavelength range.
format	article
author	Emilija Petronijevic Alessandro Belardini Grigore Leahu Teemu Hakkarainen Marcelo Rizzo Piton Eero Koivusalo Concita Sibilia
author_facet	Emilija Petronijevic Alessandro Belardini Grigore Leahu Teemu Hakkarainen Marcelo Rizzo Piton Eero Koivusalo Concita Sibilia
author_sort	Emilija Petronijevic
title	Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
title_short	Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
title_full	Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
title_fullStr	Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
title_full_unstemmed	Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au
title_sort	broadband optical spin dependent reflection in self-assembled gaas-based nanowires asymmetrically hybridized with au
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e77d0d3d16d54092a33db82472976cb0
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Broadband optical spin dependent reflection in self-assembled GaAs-based nanowires asymmetrically hybridized with Au

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