Self-assembled 3D photonic crystals from ZnO colloidal spheres

Eric W. Seelig, Betty Tang, Alexey Yamilov, Hui Cao, Robert P. H. Chang

Research output: Contribution to journalArticle

195 Citations (Scopus)

Abstract

We present a novel method for the controlled synthesis of monodisperse ZnO colloidal spheres. These spheres are self-assembled into fcc periodic arrays. Optical measurements, including reflection-mode optical microscopy and transmission and single-domain reflection spectroscopy, reveal that the periodic arrays exhibit a photonic band gap in the (1 1 1) direction of the fcc lattice, and calculations are presented to estimate the effective value of the refractive index of the colloidal spheres. Finally, photoluminescence (PL) measurements show that the ZnO lasing thresholds are lower in periodic structures than in random arrays of identical spheres.

Original languageEnglish
Pages (from-to)257-263
Number of pages7
JournalMaterials Chemistry and Physics
Volume80
Issue number1
DOIs
Publication statusPublished - Apr 29 2003

Fingerprint

Photonic crystals
photonics
crystals
Photonic band gap
Periodic structures
Light transmission
optical measurement
Optical microscopy
lasing
Refractive index
Photoluminescence
Spectroscopy
refractivity
microscopy
photoluminescence
thresholds
synthesis
estimates
spectroscopy

Keywords

  • Colloidal spheres
  • Photonic crystals
  • Self-assembly
  • Zinc oxide

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Self-assembled 3D photonic crystals from ZnO colloidal spheres. / Seelig, Eric W.; Tang, Betty; Yamilov, Alexey; Cao, Hui; Chang, Robert P. H.

In: Materials Chemistry and Physics, Vol. 80, No. 1, 29.04.2003, p. 257-263.

Research output: Contribution to journalArticle

Seelig, Eric W. ; Tang, Betty ; Yamilov, Alexey ; Cao, Hui ; Chang, Robert P. H. / Self-assembled 3D photonic crystals from ZnO colloidal spheres. In: Materials Chemistry and Physics. 2003 ; Vol. 80, No. 1. pp. 257-263.
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