Preparation of photonic crystals made of air spheres in titania

Judith E.G.J. Wijnhoven; Willem L. Vos

doi:10.1126/science.281.5378.802

Preparation of photonic crystals made of air spheres in titania

Judith E.G.J. Wijnhoven, Willem L. Vos^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

1774 Citations (Scopus)

Abstract

Three-dimensional crystals of air spheres in titania (TiO₂) with radii between 120 and 1000 nanometers were made by filling the voids in artificial opals by precipitation from a liquid-phase chemical reaction and subsequently removing the original opal material by calcination. These macroporous materials are a new class of photonic band gap crystals for the optical spectrum. Scanning electron microscopy, Raman spectroscopy, and optical microscopy confirm the quality of the samples, and optical reflectivity demonstrates that the crystals are strongly photonic and near that needed to exhibit band gap behavior.

Original language	English
Pages (from-to)	802-804
Number of pages	3
Journal	Science
Volume	281
Issue number	5378
DOIs	https://doi.org/10.1126/science.281.5378.802
Publication status	Published - 7 Aug 1998
Externally published	Yes

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AB - Three-dimensional crystals of air spheres in titania (TiO2) with radii between 120 and 1000 nanometers were made by filling the voids in artificial opals by precipitation from a liquid-phase chemical reaction and subsequently removing the original opal material by calcination. These macroporous materials are a new class of photonic band gap crystals for the optical spectrum. Scanning electron microscopy, Raman spectroscopy, and optical microscopy confirm the quality of the samples, and optical reflectivity demonstrates that the crystals are strongly photonic and near that needed to exhibit band gap behavior.

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Preparation of photonic crystals made of air spheres in titania

Abstract

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