Abstract

We report on the design and fabrication of nearly polarization-insensitive angular filters, which have been developed through the optimization of one-dimensional ${\rm Ag}/{{\rm MgF}_2}$ photonic crystals (PCs). We evaluate different initial systems for optimization and compare their results in terms of both the wavelength and angular selectivity. Our findings reveal that relaxing the strict periodic condition of initial photonic crystals with a small number of lattices has enabled improvement in the angular selectivity via Fabry–Perot resonances in dielectric layers, achieving a transmission as high as 81% at normal incidence by optimizing the dielectric layer thickness. The simulation results demonstrate that the transmitted beam through the angular filtering sample at 633 nm has allowable angles within 29° and 33° for TE and TM polarization, respectively, with a transmission over 80% at normal incidence. This proposed and demonstrated angular filter represents what we believe is a novel way to utilize 1D metal-dielectric PCs as polarization-insensitive angular filters, overcoming the main drawback of a low transmission. This angular filter will have significant applications in lighting, beam manipulation, optical coupling, and optical detectors.

© 2024 Optica Publishing Group

All-angle polarization-insensitive negative refraction in high-dielectric photonic crystal

Mansour Zaremanesh and Mina Noori
Appl. Opt. 58(21) 5631-5636 (2019)

Three-periodic 1D photonic crystals for designing the photonic optical devices operating in the infrared regime

Ivan S. Panyaev, Dmitry G. Sannikov, Nataliya N. Dadoenkova, and Yuliya S. Dadoenkova
Appl. Opt. 60(7) 1943-1952 (2021)

Wide-angle filters based on nanoresonators for the visible spectrum

I. L. Gomes de Souza, V. F. Rodriguez-Esquerre, and D. F. Rêgo
Appl. Opt. 57(23) 6755-6759 (2018)

Dual and narrow-band optical filtering and sensing enabled by asymmetric dielectric metagratings

Aibibula Abudula, Abulizi Abulaiti, Melike Mohamedsedik, Feng Xu, and Paerhatijiang Tuersun
Opt. Mater. Express 14(2) 445-456 (2024)

Elevation-azimuth angular selectivity and angle-frequency filtering in asymmetric photonic crystal

Yadong Lu, Lianshan Yan, Yinghui Guo, Yan Pan, Wei Pan, and Bin Luo
Opt. Express 24(21) 24473-24482 (2016)