Avoiding cracks in self-assembled photonic band-gap crystals

被引：126

作者：

Chabanov, AA ^{[1
]}

Jun, Y ^{[1
]}

Norris, DJ ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1737066

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin colloidal crystals (or synthetic opals) composed of Stober silica spheres typically develop cracks when they are utilized to obtain photonic band-gap crystals (or inverted opals). We find that, by sintering the silica spheres prior to assembly of the opal, these cracks can be avoided. We report the effects of temperature and duration of the heat treatment on 850 nm silica spheres using electron microscopy, thermogravimetry, and light scattering. We also find a large dependence of the refractive index of the silica on the temperature of the heat treatment. This may allow tuning of the refractive index of silica spheres. (C) 2004 American Institute of Physics.

引用

页码：3573 / 3575

页数：3

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