Periodical focusing mode achieved through a chain of mesoscale dielectric particles with a refractive index near unity

Cheng Yang Liu, Oleg V. Minin, Igor V. Minin

Результат исследований: Материалы для журналаСтатья


At present three main mechanisms of optical propagation with periodically focused modes in the chains of dielectric spherical particles with a refractive index near n [Formula presented] 1.59 are considered in the literature: evanescent whispering gallery mode coupling, photonic nanojet-induced modes, and the propagation of transverse magnetic modes under conditions close to Brewster angle geometry. In this paper we show that quasi-periodical focusing modes exist in a range of near unity refractive indices for chains of dielectric particles in both spherical and cubic forms. We also show that such a medium can be considered a gradient index waveguide with a parabolic law of refractive index variation.

Язык оригиналаАнглийский
Страницы (с-по)110-117
Число страниц8
ЖурналOptics Communications
СостояниеОпубликовано - 1 мар 2019


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering