Self-assembled 3D photonic crystals from ZnO colloidal spheres

被引：199

作者：

Seelig, EW

Tang, B

Yamilov, A

Cao, H

Chang, RPH ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA

[3] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 80卷 / 01期

基金：

美国国家科学基金会;

关键词：

zinc oxide; colloidal spheres; self-assembly; photonic crystals;

D O I：

10.1016/S0254-0584(02)00492-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a novel method for the controlled synthesis of monodisperse ZnO colloidal spheres. These spheres are self-assembled into fee 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. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：257 / 263

页数：7

共 33 条

[1] Large-scale synthesis of a silicon photonic crystal with a complete three-dimensional bandgap near 1.5 micrometres [J].