TITLE

Photonic crystals of core-shell colloidal particles

AUTHOR(S)
Velikov, Krassimir P.; Moroz, Alexander; van Blaaderen, Alfons
PUB. DATE
January 2002
SOURCE
Applied Physics Letters;1/7/2002, Vol. 80 Issue 1, p49
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the fabrication and optical transmission studies of thin three-dimensional photonic crystals of high-dielectric ZnS-core and low-dielectric SiO[sub 2]-shell colloidal particles. These samples were fabricated using a vertical controlled drying method. The spectral position and width of a stopgap depend on the core-to-shell ratio, in a manner consistent with numerical calculations. Both experiments and calculations show that the relative L-stopgap width in the case of high-index core low-index shell particles can be larger in comparison to the case of homogeneous particles of either material. The core-shell morphology gives additional control over the photonic stopgap characteristics.
ACCESSION #
5792093

 

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