Research Papers

Reflectivity enhanced two-dimensional dielectric particle array monolayer diffraction

[+] Author Affiliations
Alexander Tikhonov

University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania 15260

Nikolay Kornienko

University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania 15260

Jian-Tao Zhang

University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania 15260

Luling Wang

University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania 15260

Sanford A. Asher

University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania 15260

J. Nanophoton. 6(1), 063509 (Jun 08, 2012). doi:10.1117/1.JNP.6.063509
History: Received February 10, 2012; Revised April 5, 2012; Accepted April 5, 2012
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Abstract.  Very high diffraction efficiencies (>80%) were observed from two-dimensional (2-D) photonic crystals made of monolayers of 490nm 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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Alexander Tikhonov ; Nikolay Kornienko ; Jian-Tao Zhang ; Luling Wang and Sanford A. Asher
"Reflectivity enhanced two-dimensional dielectric particle array monolayer diffraction", J. Nanophoton. 6(1), 063509 (Jun 08, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.063509


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