Bandgap engineering of face-centered cubic photonic crystals made of hollow spheres

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A three-dimensional photonic band structure was calculated numerically for a self-assembled face-centered cubic (FCC) lattice of hollow spheres either formed in air or embedded in a high-refractive-index dielectric medium. For the latter case, the bandgap and midgap frequency can be controlled precisely when the shell thickness, the shell radius, and the ratio of dielectric constants are changed between the shell and the interstitial medium. Eventually, we demonstrate that a FCC lattice of hollow spheres with a suitable shell thickness in a dielectric medium can be engineered to have a bandgap-to-midgap ratio as high as 4.5% and a bandgap 31% higher than for an identical structure of homogeneous spheres. (C) 2001 Optical Society of America.
Publisher
OPTICAL SOC AMER
Issue Date
2001-08
Language
English
Article Type
Article
Keywords

SELF-ORGANIZING SYSTEMS; POLYSTYRENE BEADS; GAPS; WAVELENGTHS; ARRAYS

Citation

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, v.18, no.8, pp.1156 - 1160

ISSN
0740-3224
URI
http://hdl.handle.net/10203/12604
Appears in Collection
CBE-Journal Papers(저널논문)
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