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Proceedings Paper

Design of a double grating-coupled surface plasmon color filter
Author(s): Jingjing Guo; Yan Tu; Lanlan Yang; Lili Wang; Baoping Wang
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Paper Abstract

Surface plasmon-based nanophotonic devices are advanced in high-sensitivity of wavelength, which can be used to fabricate narrow band color filters. But when SP is excited by grating-coupled structure, the evanescent wave is limited on the interface of metal and dielectric. We design a tunable transmissive filter, consisting of two same sinusoids metal gratings with corresponding substrates and a modulation layer. Herein the dielectric medium is used as the modulation layer and is sandwiched between two metallic gratings. The two metallic gratings are symmetric. If the incident TM wave satisfies the momentum matching condition, the SP excitation at the first metal-dielectric interface will arouse the SP excitation with the same frequency on the second metal-dielectric interface. Then waves with a certain spectrum bandwidth transmit to the far field. The way to tune the selected wavelength is changing the grating period and the distance between two metal gratings in the range of SP penetrating depth. We analyze the influence of the structure profile on the wavelength selectivity. Results show that this novel color filter can realize a continuous shift of transmission peak in the visible range. The transmissivity is higher than 60%. It can be applied to the high resolution display devices to improve the quality of color images.

Paper Details

Date Published: 24 February 2016
PDF: 7 pages
Proc. SPIE 9744, Optical Components and Materials XIII, 97440C (24 February 2016); doi: 10.1117/12.2208776
Show Author Affiliations
Jingjing Guo, Southeast Univ. (China)
Yan Tu, Southeast Univ. (China)
Lanlan Yang, Southeast Univ. (China)
Lili Wang, Southeast Univ. (China)
Baoping Wang, Southeast Univ. (China)

Published in SPIE Proceedings Vol. 9744:
Optical Components and Materials XIII
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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