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Fabrication and optical characterizations of gold nanoshell opal

Published online by Cambridge University Press:  03 March 2011

Jin Hyoung Lee ,
Qi Wu  and
Wounjhang Park
Jin Hyoung Lee
Affiliation:
Department of Electrical and Computer Engineering, University of Colorado, Boulder, Colorado 80309
Qi Wu
Affiliation:
Department of Electrical and Computer Engineering, University of Colorado, Boulder, Colorado 80309
Wounjhang Park*
Affiliation:
Department of Electrical and Computer Engineering, University of Colorado, Boulder, Colorado 80309
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

We fabricated three-dimensional photonic crystals by self-assembling gold nanoshells via forced sedimentation method. Gold nanoshells with a diameter of 458 nm (418-nm silica core and 20-nm gold shell) were synthesized and self-assembled into a 5-μm-thick opal structure. We observed reflection peaks at 710 and 1240 nm, which are believed to be from the complete three-dimensional photonic band gap and the (111) directional gap, respectively. Theses results were in good agreement with the photonic band-structure calculations done by the finite-difference time-domain method. Angle-resolved reflectivity measurements were also performed to investigate the existence of the complete three-dimensional photonic band gap.

Keywords

Core/shellNanostructureSelf-assembly
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 12 , December 2006 , pp. 3215 - 3221
Copyright
Copyright © Materials Research Society 2006

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