Open AccessAngle-insensitive plasmonic nanorod metamaterial-based band-pass optical filters
Author(s) -
Brian Wells,
Francesco Lotti,
Mazhar E. Nasir,
Anatoly V. Zayats,
Viktor A. Podolskiy
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.418268
Subject(s) - metamaterial , optics , plasmon , nanorod , transformation optics , wavelength , bandwidth (computing) , anisotropy , materials science , optical filter , physics , dielectric , optoelectronics , telecommunications , computer science , nanotechnology
We demonstrate, experimentally and theoretically, a new class of angle-insensitive band-pass optical filters that utilize anisotropy of plasmonic nanorod metamaterials, in both ε ≃ -1 and epsilon-near-infinity regimes, to minimize dependence of optical path on the incident angle. The operating wavelength and bandwidth of the filter can be engineered by controlling the geometry of the metamaterial. Experimental results are in agreement with full wave numerical and analytical solutions of the Maxwell's equations. Theoretical simulations show that performance of the systems can be further improved by replacing metallic mirrors with dielectric stacks.