Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna

Abstract We propose an axisymmetric silicon nanoresonator with designed tapered angle well for the extraordinary enhancement of the decay rate of magnetic dipole (MD) emitters. Due to the resonant coupling of a MD emitter and the MD mode of the subwavelength resonator, the Purcell factor (PF) can ea...

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Autores principales:	Mojtaba Karimi Habil, Carlos J. Zapata–Rodríguez, Mauro Cuevas, Samad Roshan Entezar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9485e29e26a4442da58c55609a82049a
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spelling	oai:doaj.org-article:9485e29e26a4442da58c55609a82049a2021-12-02T17:41:31ZMultipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna10.1038/s41598-021-92322-92045-2322https://doaj.org/article/9485e29e26a4442da58c55609a82049a2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92322-9https://doaj.org/toc/2045-2322Abstract We propose an axisymmetric silicon nanoresonator with designed tapered angle well for the extraordinary enhancement of the decay rate of magnetic dipole (MD) emitters. Due to the resonant coupling of a MD emitter and the MD mode of the subwavelength resonator, the Purcell factor (PF) can easily reach 500, which is significantly higher than the PF when using a silicon nanosphere of the same size. The PF and the resonance frequency are conveniently tuned through the resonator diameter and the taper angle of the blind hole. When supported by a metallic substrate, further enhancement ( $$>10^3$$ > 10 3 ) of the MD spontaneous emission is triggered by an image-induced quadrupolar high-Q mode of the nanoantenna. For the sake of comparison we include a critical analysis of the canonical problem that considers a Si spherical shell. Our results might facilitate a novel strategy for promising realizations of chip-scale nanophotonic applications.Mojtaba Karimi HabilCarlos J. Zapata–RodríguezMauro CuevasSamad Roshan EntezarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mojtaba Karimi Habil Carlos J. Zapata–Rodríguez Mauro Cuevas Samad Roshan Entezar Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
description	Abstract We propose an axisymmetric silicon nanoresonator with designed tapered angle well for the extraordinary enhancement of the decay rate of magnetic dipole (MD) emitters. Due to the resonant coupling of a MD emitter and the MD mode of the subwavelength resonator, the Purcell factor (PF) can easily reach 500, which is significantly higher than the PF when using a silicon nanosphere of the same size. The PF and the resonance frequency are conveniently tuned through the resonator diameter and the taper angle of the blind hole. When supported by a metallic substrate, further enhancement ( $$>10^3$$ > 10 3 ) of the MD spontaneous emission is triggered by an image-induced quadrupolar high-Q mode of the nanoantenna. For the sake of comparison we include a critical analysis of the canonical problem that considers a Si spherical shell. Our results might facilitate a novel strategy for promising realizations of chip-scale nanophotonic applications.
format	article
author	Mojtaba Karimi Habil Carlos J. Zapata–Rodríguez Mauro Cuevas Samad Roshan Entezar
author_facet	Mojtaba Karimi Habil Carlos J. Zapata–Rodríguez Mauro Cuevas Samad Roshan Entezar
author_sort	Mojtaba Karimi Habil
title	Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
title_short	Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
title_full	Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
title_fullStr	Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
title_full_unstemmed	Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
title_sort	multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9485e29e26a4442da58c55609a82049a
work_keys_str_mv	AT mojtabakarimihabil multipolarsensitiveengineeringofmagneticdipolespontaneousemissionwithadielectricnanoresonatorantenna AT carlosjzapatarodriguez multipolarsensitiveengineeringofmagneticdipolespontaneousemissionwithadielectricnanoresonatorantenna AT maurocuevas multipolarsensitiveengineeringofmagneticdipolespontaneousemissionwithadielectricnanoresonatorantenna AT samadroshanentezar multipolarsensitiveengineeringofmagneticdipolespontaneousemissionwithadielectricnanoresonatorantenna
_version_	1718379658666311680

Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna

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