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Colloidal photonic crystal microchannel array with periodically modulated thickness

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3 Author(s)
Mı guez, H. ; Materials Chemistry Research Group, Lash Miller Chemical Laboratories, Department of Chemistry, University of Toronto, 80, Saint George Street, M5S 3H6 Toronto, Ontario, Canada ; Yang, S.M. ; Ozin, G.A.

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Here we report on the optical properties of a micrometer scale array of periodically modulated thickness colloidal crystals. A combination of soft-lithography, micromolding, and microfluidics techniques is employed to form rectangular microchannels that can impose a periodic modulation of the thickness of colloidal crystals grown within them. Correspondingly, a periodic fluctuation of the photonic band structure occurs at distances of the order of a few microns. Experimental evidence of this effect is obtained by optical microspectroscopy. Results are analyzed in terms of finite crystal size theoretical calculations. © 2002 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:81 ,  Issue: 14 )