High transmission and low color cross-talk plasmonic color filters using triangular-lattice hole arrays in aluminum films

Chen, Q. and Cumming, D.R.S. (2010) High transmission and low color cross-talk plasmonic color filters using triangular-lattice hole arrays in aluminum films. Optics Express, 18(13), pp. 14056-14062. (doi:10.1364/OE.18.014056)

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Abstract

Three primary color ( red, green and blue) filters consisting of subwavelength triangular-lattice hole arrays in an aluminum film on glass were simulated and fabricated. A silicon dioxide cap layer, deposited on the patterned aluminum film, was found to almost double the transmission efficiency for all the filters. The measured peak transmittance for each color filter was above 30%, exhibiting a wavelength spectrum with a full-width at half-maximum of approximately 100 nm. Simulation results of various structures with different cap layers revealed the enhanced coupling between surface plasmon resonances at both sides of the metal film in a symmetrical configuration. It was found that gratings with as few as three periods were sufficient to demonstrate filtering. The effect of metal thickness and hole size was investigated in detail. (C) 2010 Optical Society of America

Item Type:Articles
Keywords:Arrays, gratings, light, transmission
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cumming, Professor David and Chen, Dr Qin
Authors: Chen, Q., and Cumming, D.R.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087

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