Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 110-117 |
| Number of pages | 8 |
| Journal | Optics Communications |
| Volume | 434 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Keywords
- Mesoscale particle
- Periodical focusing mode
- Photonic jet
- Refractive index
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
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Liu, C. Y., Minin, O. V., & Minin, I. V. (2019). Periodical focusing mode achieved through a chain of mesoscale dielectric particles with a refractive index near unity. Optics Communications, 434, 110-117. https://doi.org/10.1016/j.optcom.2018.10.044