Whispering-gallery modes promote enhanced optical backflow in a perforated dielectric microsphere; Optics Letters; Vol. 47, iss. 7

Whispering-gallery modes promote enhanced optical backflow in a perforated dielectric microsphere; Optics Letters; Vol. 47, iss. 7

Dades bibliogràfiques
Parent link:	Optics Letters Vol. 47, iss. 7.— 2022.— [P. 1786-1789]
Autor principal:	Geynts Yu. E. Yury Elmarovich
Autor corporatiu:	Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение электронной инженерии
Altres autors:	Minin I. V. Igor Vladilenovich, Minin O. V. Oleg Vladilenovich
Sumari:	Title screen Optical energy flow inside a dielectric microsphere is usually co-directed with the optical wave vector. At the same time, if the optical field in a microsphere is in resonance with one of the high-quality spatial eigenmodes (whispering-gallery modes— WGMs), a region of reverse energy flow emerges in the shadow hemisphere. This area is of considerable practical interest due to increased optical trapping potential. In this Letter, we consider a perforated microsphere with an air-filled pinhole fabricated along the particle diameter and numerically analyze the peculiarities of WGM excitation in a nanostructured microsphere. A pinhole isolates the energy backflow region of a resonant mode and changes a perforated microsphere into an efficient optical tweezer. For the first time, to the best of our knowledge, a multiple enhancement of the energy backflow intensity in the pinhole at a WGM resonance is revealed and we discuss the ways for its manipulation. Режим доступа: по договору с организацией-держателем ресурса
Idioma:	anglès
Publicat:	2022
Matèries:	электронный ресурс труды учёных ТПУ
Accés en línia:	https://doi.org/10.1364/OL.452683
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668071

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