Special Section on Nanostructured Thin Films: Fundamentals and Applications

Nanostructure surface design for broadband and angle-independent antireflection

[+] Author Affiliations
Yi Fan Huang

National Yang Ming University, Institute of Biophotonics, No. 155, Sec. 2, Li-Nong Street, Taipei 112, Taiwan

Surojit Chattopadhyay

National Yang Ming University, Institute of Biophotonics, No. 155, Sec. 2, Li-Nong Street, Taipei 112, Taiwan

National Yang Ming University, Biophotonics and Molecular Imaging Research Center, Taipei 112, Taiwan

J. Nanophoton. 7(1), 073594 (Apr 09, 2013). doi:10.1117/1.JNP.7.073594
History: Received September 20, 2012; Revised March 12, 2013; Accepted March 14, 2013
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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 (75deg). 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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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Yi Fan Huang and Surojit Chattopadhyay
"Nanostructure surface design for broadband and angle-independent antireflection", J. Nanophoton. 7(1), 073594 (Apr 09, 2013). ; http://dx.doi.org/10.1117/1.JNP.7.073594


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