Efficient coupling of free propagating light into Whispering Gallery Modes

Whispering Gallery Mode resonators are dielectric structures with cylindrical symmetry. They are typically excited with an evanescent field leaking out of a tapered fiber or a waveguide. It is also known that they can be excited with free propagating beams. In this work, we use a recently developed...

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Autores principales:	Zambrana-Puyalto Xavier, D’Ambrosio Davide, Gagliardi Gianluca
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/5f03346f46ad4a0db47ec97d6c0edcb5
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id	oai:doaj.org-article:5f03346f46ad4a0db47ec97d6c0edcb5
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spelling	oai:doaj.org-article:5f03346f46ad4a0db47ec97d6c0edcb52021-12-02T17:12:51ZEfficient coupling of free propagating light into Whispering Gallery Modes2100-014X10.1051/epjconf/202125504002https://doaj.org/article/5f03346f46ad4a0db47ec97d6c0edcb52021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/09/epjconf_eosam2021_04002.pdfhttps://doaj.org/toc/2100-014XWhispering Gallery Mode resonators are dielectric structures with cylindrical symmetry. They are typically excited with an evanescent field leaking out of a tapered fiber or a waveguide. It is also known that they can be excited with free propagating beams. In this work, we use a recently developed analytical model which quantitatively describes the coupling of free propagating beams into Whispering Gallery Modes for spherical particles. Using this model, we have been able to theoretically quantify the mode purity and the coupling efficiency of a resonant Whispering Gallery Mode of an order j*= 1456. We have observed that the transverse position of the beam plays a crucial role in determining the mode purity and coupling efficiency. Last but not least, we have verified that the coupling efficiency as well as the Q-factor predicted by our model are in an outstanding agreement with the experimental values measured on a microresonator of the same dimensions as the simulated one.Zambrana-Puyalto XavierD’Ambrosio DavideGagliardi GianlucaEDP SciencesarticlePhysicsQC1-999ENEPJ Web of Conferences, Vol 255, p 04002 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Zambrana-Puyalto Xavier D’Ambrosio Davide Gagliardi Gianluca Efficient coupling of free propagating light into Whispering Gallery Modes
description	Whispering Gallery Mode resonators are dielectric structures with cylindrical symmetry. They are typically excited with an evanescent field leaking out of a tapered fiber or a waveguide. It is also known that they can be excited with free propagating beams. In this work, we use a recently developed analytical model which quantitatively describes the coupling of free propagating beams into Whispering Gallery Modes for spherical particles. Using this model, we have been able to theoretically quantify the mode purity and the coupling efficiency of a resonant Whispering Gallery Mode of an order j*= 1456. We have observed that the transverse position of the beam plays a crucial role in determining the mode purity and coupling efficiency. Last but not least, we have verified that the coupling efficiency as well as the Q-factor predicted by our model are in an outstanding agreement with the experimental values measured on a microresonator of the same dimensions as the simulated one.
format	article
author	Zambrana-Puyalto Xavier D’Ambrosio Davide Gagliardi Gianluca
author_facet	Zambrana-Puyalto Xavier D’Ambrosio Davide Gagliardi Gianluca
author_sort	Zambrana-Puyalto Xavier
title	Efficient coupling of free propagating light into Whispering Gallery Modes
title_short	Efficient coupling of free propagating light into Whispering Gallery Modes
title_full	Efficient coupling of free propagating light into Whispering Gallery Modes
title_fullStr	Efficient coupling of free propagating light into Whispering Gallery Modes
title_full_unstemmed	Efficient coupling of free propagating light into Whispering Gallery Modes
title_sort	efficient coupling of free propagating light into whispering gallery modes
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/5f03346f46ad4a0db47ec97d6c0edcb5
work_keys_str_mv	AT zambranapuyaltoxavier efficientcouplingoffreepropagatinglightintowhisperinggallerymodes AT dambrosiodavide efficientcouplingoffreepropagatinglightintowhisperinggallerymodes AT gagliardigianluca efficientcouplingoffreepropagatinglightintowhisperinggallerymodes
_version_	1718381380597972992

Efficient coupling of free propagating light into Whispering Gallery Modes

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