Reflectivity enhanced two-dimensional dielectric particle array monolayer diffraction

Alexander Tikhonov, Nikolay Kornienko, Jian Tao Zhang, Luling Wang, Sanford A. Asher

Research output: Contribution to journalArticle

24 Citations (Scopus)

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.

Original languageEnglish
Article number063509
JournalJournal of Nanophotonics
Volume6
Issue number1
DOIs
Publication statusPublished - Dec 1 2012
Externally publishedYes

Keywords

  • Diffraction
  • Photonic crystals
  • Photonics
  • Reflectance
  • Sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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