Open AccessGuided-mode resonant polarization-controlled tunable color filters
Author(s) -
Mohammad Jalal Uddin,
Tanzina Khaleque,
Robert Magnusson
Publication year - 2014
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.22.012307
Subject(s) - materials science , color filter array , optics , grating , optoelectronics , polarization (electrochemistry) , guided mode resonance , color gel , polarizing filter , diffraction grating , silicon , optical filter , physics , chemistry , layer (electronics) , composite material , thin film transistor
We demonstrate efficient guided-mode resonant polarization-controlled tunable color filters. The devices consist of subwavelength gratings that are partially etched into a thin silicon-nitride film deposited on a glass substrate. Two color filters with grating periods of 300 nm and 370 nm are designed and fabricated. The 300-nm device exhibits green and blue colors and the 370-nm device generates red and yellow colors for TE and TM polarization, respectively. The pixels have a spectral bandwidth of ~12 nm with efficiencies exceeding 90% for TE polarization and 80% for TM polarization. The devices may find application in displays, image sensors, and biomedical imaging technologies.