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Journal of Nanophotonics

Reflectivity enhanced two-dimensional dielectric particle array monolayer diffraction
Author(s): Alexander Tikhonov; Nikolay Kornienko; Jian-Tao Zhang; Luling Wang; Sanford A. Asher
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Paper Abstract

Very high diffraction efficiencies (>80%) were observed from two-dimensional (2-D) photonic crystals made of monolayers of ∼ 490  nm diameter dielectric polystyrene spheres arranged in a 2-D hexagonal lattice on top of a liquid mercury surface. These almost close packed 2-D polystyrene particle arrays were prepared by a self-assembly spreading method that utilizes solvent evaporation from the mercury surface. Two-dimensional arrays transferred onto a dielectric glass substrate placed on top of metal mirrors show diffraction efficiencies of over 30%, which is 6- to 8-fold larger than those of the same 2-D monolayers in the absence of mirrors. A simple single particle scattering model with refraction explains the high diffraction efficiencies in terms of reflection of the high intensity forward diffraction.

Paper Details

Date Published: 8 June 2012
PDF: 10 pages
J. Nanophoton. 6(1) 063509 doi: 10.1117/1.JNP.6.063509
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Alexander Tikhonov, Univ. of Pittsburgh (United States)
Nikolay Kornienko, Univ. of Pittsburgh (United States)
Jian-Tao Zhang, Univ. of Pittsburgh (United States)
Luling Wang, Univ. of Pittsburgh (United States)
Sanford A. Asher, Univ. of Pittsburgh (United States)

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