Nanostructure surface design for broadband and angle-independent antireflection

Yi Fan Huang; Surojit Chattopadhyay

doi:10.1117/1.JNP.7.073594

9 April 2013 Nanostructure surface design for broadband and angle-independent antireflection

Yi Fan Huang, Surojit Chattopadhyay

Author Affiliations +

Journal of Nanophotonics, Vol. 7, Issue 1, 073594 (April 2013). https://doi.org/10.1117/1.JNP.7.073594

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.

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Yi Fan Huang and Surojit Chattopadhyay "Nanostructure surface design for broadband and angle-independent antireflection," Journal of Nanophotonics 7(1), 073594 (9 April 2013). https://doi.org/10.1117/1.JNP.7.073594

Published: 9 April 2013

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