Open AccessTransmitted plasmonic colors with different overlays utilizing the Fano-resonance
Author(s) -
Shangliang Wu,
Yonghong Yan,
Yanzheng Gu,
Linsen Chen
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.009570
Subject(s) - optics , refractive index , fano resonance , figure of merit , color gel , plasmon , materials science , color filter array , sensitivity (control systems) , visible spectrum , optoelectronics , resonance (particle physics) , physics , nanotechnology , layer (electronics) , particle physics , electronic engineering , engineering , thin film transistor
This study develops a large-area pixelated filter that can achieve colors covering the entire visible range with a fixed period under normal incidence. Vivid colors as blue, green, and yellow (peak efficiency of ~60%) are experimentally achieved based on a Fano-resonance by altering the overlay's refractive index, which is highly sensitive to the surrounding material. Furthermore, the feasibility of using this device in large-area color printing and index sensors is discussed in detail, wherein a large-area (3 cm × 3 cm) logo and a figure of merit of 254 are achieved. Therefore, this developed structure can be regarded as an alternative to traditional periodic-dependent structure colors, which can also be performed as index sensors with high sensitivity.