Large-area broadband optical absorber fabricated by shadowing sphere lithography

We report a large-area broadband optical absorber consisting of Ag/SiO stacked plasmonic layers fabricated on a self-assembly polystyrene sphere monolayer using the glancing angle deposition. Such an absorber can absorb more than 90% of light in the spectral range of 350 - 850 nm when the polystyren...

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Bibliographic Details
Published in:Optics express 2018-03, Vol.26 (6), p.7507-7515
Main Authors: Wang, Hong-Feng, Shi, Jun-Xian, Qian, Lin-Yong, Yan, Chang-Chun, Han, Cai-Qin, Zhao, Yi-Ping
Format: Article
Language:English
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Summary:We report a large-area broadband optical absorber consisting of Ag/SiO stacked plasmonic layers fabricated on a self-assembly polystyrene sphere monolayer using the glancing angle deposition. Such an absorber can absorb more than 90% of light in the spectral range of 350 - 850 nm when the polystyrene spheres have a diameter of 750 nm. The broadband absorption is due to the overlap of localized plasmonic resonance wavelengths resulting from different patchy sizes and shapes of Ag coating on polystyrene spheres. Such a simple, flexible and large-area absorber has potential applications in light cloaking and energy conversion.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.007507