Тип публикации: статья из журнала
Год издания: 2019
Идентификатор DOI: 10.1364/OL.44.005743
Аннотация: Collective lattice resonances (CLRs) in finite-sized 2D arrays of dielectric nanospheres have been studied via the coupled dipole approximation. We show that even for sufficiently large arrays, up to 100 x 100 nanoparticles (NPs), electric or magnetic dipole CLRs may differ significantly from the ones calculated for infinite arraysПоказать полностьюwith the same NP sizes and interparticle distances. The discrepancy is explained by the existence of a sufficiently strong cross-interaction between electric and magnetic dipoles induced at NPs in finite-sized lattices, which is ignored for infinite arrays. We support this claim numerically and propose an analytic model to estimate a spectral width of CLRs for finite-sized arrays. Given that most of the current theoretical and numerical researches on collective effects in arrays of dielectric NPs rely on modeling infinite structures, the reported findings may contribute to thoughtful and optimal design of inherently finite-sized photonic devices. (C) 2019 Optical Society of America
Журнал: OPTICS LETTERS
Выпуск журнала: Vol. 44, Is. 23
Номера страниц: 5743-5746
ISSN журнала: 01469592
Место издания: WASHINGTON
Издатель: OPTICAL SOC AMER