Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires

Abstract Optically pumped lasing from highly Zn-doped GaAs nanowires lying on an Au film substrate and from Au-coated nanowires has been demonstrated up to room temperature. The conically shaped GaAs nanowires were first coated with a 5 nm thick Al2O3 shell to suppress atmospheric oxidation and band...

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Autores principales:	Gyanan Aman, Fatemeh Mohammadi, Martin Fränzl, Mykhaylo Lysevych, Hark Hoe Tan, Chennupati Jagadish, Heidrun Schmitzer, Marc Cahay, Hans Peter Wagner
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/93b1de9b54d74b3bb14446fbd03f5f09
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spelling	oai:doaj.org-article:93b1de9b54d74b3bb14446fbd03f5f092021-11-08T10:56:10ZEffect of Au substrate and coating on the lasing characteristics of GaAs nanowires10.1038/s41598-021-00855-w2045-2322https://doaj.org/article/93b1de9b54d74b3bb14446fbd03f5f092021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00855-whttps://doaj.org/toc/2045-2322Abstract Optically pumped lasing from highly Zn-doped GaAs nanowires lying on an Au film substrate and from Au-coated nanowires has been demonstrated up to room temperature. The conically shaped GaAs nanowires were first coated with a 5 nm thick Al2O3 shell to suppress atmospheric oxidation and band-bending effects. Doping with a high Zn concentration increases both the radiative efficiency and the material gain and leads to lasing up to room temperature. A detailed analysis of the observed lasing behavior, using finite-difference time domain simulations, reveals that the lasing occurs from low loss hybrid modes with predominately photonic character combined with electric field enhancement effects. Achieving low loss lasing from NWs on an Au film and from Au coated nanowires opens new prospects for on-chip integration of nanolasers with new functionalities including electro-optical modulation, conductive shielding, and polarization control.Gyanan AmanFatemeh MohammadiMartin FränzlMykhaylo LysevychHark Hoe TanChennupati JagadishHeidrun SchmitzerMarc CahayHans Peter WagnerNature 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 Gyanan Aman Fatemeh Mohammadi Martin Fränzl Mykhaylo Lysevych Hark Hoe Tan Chennupati Jagadish Heidrun Schmitzer Marc Cahay Hans Peter Wagner Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
description	Abstract Optically pumped lasing from highly Zn-doped GaAs nanowires lying on an Au film substrate and from Au-coated nanowires has been demonstrated up to room temperature. The conically shaped GaAs nanowires were first coated with a 5 nm thick Al2O3 shell to suppress atmospheric oxidation and band-bending effects. Doping with a high Zn concentration increases both the radiative efficiency and the material gain and leads to lasing up to room temperature. A detailed analysis of the observed lasing behavior, using finite-difference time domain simulations, reveals that the lasing occurs from low loss hybrid modes with predominately photonic character combined with electric field enhancement effects. Achieving low loss lasing from NWs on an Au film and from Au coated nanowires opens new prospects for on-chip integration of nanolasers with new functionalities including electro-optical modulation, conductive shielding, and polarization control.
format	article
author	Gyanan Aman Fatemeh Mohammadi Martin Fränzl Mykhaylo Lysevych Hark Hoe Tan Chennupati Jagadish Heidrun Schmitzer Marc Cahay Hans Peter Wagner
author_facet	Gyanan Aman Fatemeh Mohammadi Martin Fränzl Mykhaylo Lysevych Hark Hoe Tan Chennupati Jagadish Heidrun Schmitzer Marc Cahay Hans Peter Wagner
author_sort	Gyanan Aman
title	Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
title_short	Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
title_full	Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
title_fullStr	Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
title_full_unstemmed	Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires
title_sort	effect of au substrate and coating on the lasing characteristics of gaas nanowires
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/93b1de9b54d74b3bb14446fbd03f5f09
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Effect of Au substrate and coating on the lasing characteristics of GaAs nanowires

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