Open AccessLiquid-crystal tunable color filters based on aluminum metasurfaces
Author(s) -
Zu-Wen Xie,
JhenHong Yang,
Vishal Vashistha,
Wei Lee,
KuoPing Chen
Publication year - 2017
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.25.030764
Subject(s) - color gel , materials science , liquid crystal , color filter array , structural coloration , grating , optics , optoelectronics , plasmon , voltage , liquid crystal tunable filter , diffraction grating , substrate (aquarium) , polyimide , filter (signal processing) , layer (electronics) , photonic crystal , nanotechnology , thin film transistor , oceanography , physics , quantum mechanics , geology , computer science , computer vision
Designing color pixels using plasmonic nanostructures and metasurfaces has become a luring area of research in recent years. Here, we experimentally demonstrated the voltage tunability of a dynamic plasmonic color filter by using an aluminum grating integrated with the nematic liquid crystal (LC). Along with a typical substrate coated with rubbed polyimide film, the aluminum grating itself serves as a molecular alignment layer to form a twisted LC cell. This hybrid structure allows electrically controlled transmission color by applying the voltage. A significant spectral tunability of such a device has been demonstrated by applying the small voltage from 0 to 4 V rms .
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