Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles

Magnetic Concentric Hot-Circle Generation at Optical Frequencies in All-Dielectric Mesoscale Janus Particles

Detalles Bibliográficos
Parent link:Nanomaterials
Vol. 12, iss. 19.— 2022.— [3428, 11 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение электронной инженерии
Outros autores: Minin O. V. Oleg Vladilenovich, Song Zhou, Cheng-Yang Liu, Jelene Antonicole Ngan Kong, Minin I. V. Igor Vladilenovich
Summary:Title screen
The development of all-dielectric structures with high magnetic response at optical frequencies has become a matter of intense study in past years. However, magnetic effects are weak at optical frequencies due to the small value of the magnetic permeability of natural materials. To this end, natural dielectric materials are unemployable for practical “magnetic” applications in optics. We have shown for the first time that it is possible to induce intense magnetic concentric subwavelength “hot circles” in a dielectric mesoscale Janus particle. The basis of the Janus particle is a combination of the effects of a photonic jet, whispering-gallery waves, and the concept of solid immersion. Simulations show an (H/H0)2/(E/E0)2 contrast of more than 10, and maximal magnetic field intensity enhancement is more than 1000 for a wavelength-scaled particle with a refractive index n < 2 and a size parameter in the order of 30. This work may provide a new way to realize precise magnetic devices for integrated photonic circuits and light–matter interaction.
Idioma:inglés
Publicado: 2022
Subjects:
электронный ресурс
труды учёных ТПУ
Janus particle
hot-spot generation
magnetic field
magnetic hot circles
mesotronics
частицы Януса
магнитные поля
мезотроны
Acceso en liña:https://doi.org/10.3390/nano12193428
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668395

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