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Proceedings Paper

Self-assembly of colloidal particles into three-dimensionally ordered arrays and its applications
Author(s): Byron Gates; Sang Hyun Park; Younan Xia
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Paper Abstract

This paper describes a convenient method for self-assembling monodisperse colloidal spheres into 3D ordered arrays with domain sizes as large as several square-centimeters. These arrays have a cubic-close-packed structure or a face-center- cubic lattice similar to that of a natural opal. Each array exhibits a stop band whose position is mainly determined by the diameter of the colloidal particles. This type of structure can serve as a 3D photonic band-gap crystal, which is potentially useful in controlling the emission and propagation of light. The versatility of the present technique has allowed us to tailor the photonic properties of these arrays of colloidal particles. For example, the maximum attenuation of the photonic band-gap can be modulated by controlling the number of layers along the propagation direction of the light. The position of the mid- gap can be roughly changed by controlling the diameter of the particles and subsequently fine-tuned by sintering the sample at elevated temperatures.

Paper Details

Date Published: 17 April 2000
PDF: 8 pages
Proc. SPIE 3937, Micro- and Nano-photonic Materials and Devices, (17 April 2000); doi: 10.1117/12.382812
Show Author Affiliations
Byron Gates, Univ. of Washington (United States)
Sang Hyun Park, Univ. of Washington (United States)
Younan Xia, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 3937:
Micro- and Nano-photonic Materials and Devices
Joseph W. Perry; Axel Scherer, Editor(s)

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