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Journal of Nanophotonics

Nanostructure surface design for broadband and angle-independent antireflection
Author(s): Yi Fan Huang; Surojit Chattopadhyay
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Paper Abstract

Three different antireflecting structures (ARS), namely, single-diameter nanorods, dual-diameter nanorods, and biomimetic nanotips (resembling moth-eye’s submicrostructures) were compared to each other analytically for their reflectivities, using finite difference time domain calculations. Simulation results establish the biomimetic nanotips as better ARS than the others, in the visible and near-infrared wavelength zone and over a wider angle of incidence. The reflectance values in the nanotips are significantly lower compared to both types of nanorods and also the planar silicon below the Brewster angle (∼75  deg ). The low antireflection translated to enhanced optical absorption in these subwavelength structures. A general antireflection design rule emerged from the simulation results.

Paper Details

Date Published: 9 April 2013
PDF: 10 pages
J. Nanophoton. 7(1) 073594 doi: 10.1117/1.JNP.7.073594
Published in: Journal of Nanophotonics Volume 7, Issue 1
Show Author Affiliations
Yi Fan Huang, National Yang-Ming Univ. (Taiwan)
Surojit Chattopadhyay, National Yang-Ming Univ. (Taiwan)


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