Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks

By variation of a refractive index and aspect ratio of the isolated disk, we achieved exceptional points (EPs) at which the resonant frequencies and resonant modes coalesce. However, in practice, that kind of variation presents a technological problem. We considered the method to avoid the problem b...

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Autores principales:	Konstantin Pichugin, Almas Sadreev, Evgeny Bulgakov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	resonant eigenmodes multiple exceptional points encircling of exceptional points Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/5955b71542974b91b2b0d4fd4e58e867
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id	oai:doaj.org-article:5955b71542974b91b2b0d4fd4e58e867
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spelling	oai:doaj.org-article:5955b71542974b91b2b0d4fd4e58e8672021-11-25T18:42:56ZExceptional Points through Variation of Distances between Four Coaxial Dielectric Disks10.3390/photonics81104602304-6732https://doaj.org/article/5955b71542974b91b2b0d4fd4e58e8672021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/460https://doaj.org/toc/2304-6732By variation of a refractive index and aspect ratio of the isolated disk, we achieved exceptional points (EPs) at which the resonant frequencies and resonant modes coalesce. However, in practice, that kind of variation presents a technological problem. We considered the method to avoid the problem by substitution of two disk’s dimers. In each dimer, variation of the distance between disks was equivalent to a variation of the aspect ratio of the dimer. Moreover, the variation of the distance between dimers provides the second parameter that gives rise to a vast number of EPs. We recovered the initial resonant eigenmode by encircling multiple EPs two, three, and four times in the two-dimensional parametric space of distances.Konstantin PichuginAlmas SadreevEvgeny BulgakovMDPI AGarticleresonant eigenmodesmultiple exceptional pointsencircling of exceptional pointsApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 460, p 460 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	resonant eigenmodes multiple exceptional points encircling of exceptional points Applied optics. Photonics TA1501-1820
spellingShingle	resonant eigenmodes multiple exceptional points encircling of exceptional points Applied optics. Photonics TA1501-1820 Konstantin Pichugin Almas Sadreev Evgeny Bulgakov Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
description	By variation of a refractive index and aspect ratio of the isolated disk, we achieved exceptional points (EPs) at which the resonant frequencies and resonant modes coalesce. However, in practice, that kind of variation presents a technological problem. We considered the method to avoid the problem by substitution of two disk’s dimers. In each dimer, variation of the distance between disks was equivalent to a variation of the aspect ratio of the dimer. Moreover, the variation of the distance between dimers provides the second parameter that gives rise to a vast number of EPs. We recovered the initial resonant eigenmode by encircling multiple EPs two, three, and four times in the two-dimensional parametric space of distances.
format	article
author	Konstantin Pichugin Almas Sadreev Evgeny Bulgakov
author_facet	Konstantin Pichugin Almas Sadreev Evgeny Bulgakov
author_sort	Konstantin Pichugin
title	Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
title_short	Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
title_full	Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
title_fullStr	Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
title_full_unstemmed	Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks
title_sort	exceptional points through variation of distances between four coaxial dielectric disks
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5955b71542974b91b2b0d4fd4e58e867
work_keys_str_mv	AT konstantinpichugin exceptionalpointsthroughvariationofdistancesbetweenfourcoaxialdielectricdisks AT almassadreev exceptionalpointsthroughvariationofdistancesbetweenfourcoaxialdielectricdisks AT evgenybulgakov exceptionalpointsthroughvariationofdistancesbetweenfourcoaxialdielectricdisks
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Exceptional Points through Variation of Distances between Four Coaxial Dielectric Disks

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