Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots

Control of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving...

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Autores principales:	Rodion R. Reznik, George E. Cirlin, Konstantin P. Kotlyar, Igor V. Ilkiv, Nika Akopian, Lorenzo Leandro, Valentin V. Nikolaev, Alexey V. Belonovski, Mikhail A. Kaliteevski
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nanowire quantum dot directionality of emission Purcell factor waveguide modes molecular beam epitaxy Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/9a4b15c95697484f95a21ce139d24230
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spelling	oai:doaj.org-article:9a4b15c95697484f95a21ce139d242302021-11-25T18:30:40ZPurcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots10.3390/nano111128942079-4991https://doaj.org/article/9a4b15c95697484f95a21ce139d242302021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2894https://doaj.org/toc/2079-4991Control of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving as nanoantenna coupling with the light waveguided in nanowire and the directional output beam. Here we report the beaming of the emitted light with wavelength near 800 nm by naturally formed core-shell AlGaAs NW with multiply GaAs quantum dots (QDs) diameter 30 nm and height 10 nm, while the diameter of NW 130 nm, what does not support efficient emission into waveguided modes, including the mode HE<sub>11</sub>. Experimental measurements show that intensity of emission for directions in the vicinity of the axis of NW is about two orders of magnitude higher than for perpendicular directions. The developed theoretical approach allowed us to calculate the probability of spontaneous emission for various directions and into waveguided modes and showed that highly directional radiation can be provided by the intrinsic emission properties of cylindrical NW. Our results suggest that for the small diameter of NW, directional emissions are associated with an TM<sub>0</sub> leaky mode (when electric field oriented in axial direction) and therefore manifests in an existence of axial electric dipole transitions in quantum dots.Rodion R. ReznikGeorge E. CirlinKonstantin P. KotlyarIgor V. IlkivNika AkopianLorenzo LeandroValentin V. NikolaevAlexey V. BelonovskiMikhail A. KaliteevskiMDPI AGarticlenanowirequantum dotdirectionality of emissionPurcell factorwaveguide modesmolecular beam epitaxyChemistryQD1-999ENNanomaterials, Vol 11, Iss 2894, p 2894 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nanowire quantum dot directionality of emission Purcell factor waveguide modes molecular beam epitaxy Chemistry QD1-999
spellingShingle	nanowire quantum dot directionality of emission Purcell factor waveguide modes molecular beam epitaxy Chemistry QD1-999 Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
description	Control of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving as nanoantenna coupling with the light waveguided in nanowire and the directional output beam. Here we report the beaming of the emitted light with wavelength near 800 nm by naturally formed core-shell AlGaAs NW with multiply GaAs quantum dots (QDs) diameter 30 nm and height 10 nm, while the diameter of NW 130 nm, what does not support efficient emission into waveguided modes, including the mode HE<sub>11</sub>. Experimental measurements show that intensity of emission for directions in the vicinity of the axis of NW is about two orders of magnitude higher than for perpendicular directions. The developed theoretical approach allowed us to calculate the probability of spontaneous emission for various directions and into waveguided modes and showed that highly directional radiation can be provided by the intrinsic emission properties of cylindrical NW. Our results suggest that for the small diameter of NW, directional emissions are associated with an TM<sub>0</sub> leaky mode (when electric field oriented in axial direction) and therefore manifests in an existence of axial electric dipole transitions in quantum dots.
format	article
author	Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski
author_facet	Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski
author_sort	Rodion R. Reznik
title	Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
title_short	Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
title_full	Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
title_fullStr	Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
title_full_unstemmed	Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
title_sort	purcell effect and beaming of emission in hybrid algaas nanowires with gaas quantum dots
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9a4b15c95697484f95a21ce139d24230
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Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots

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