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Fabrication of Photonic Crystals in Microchannels

Published online by Cambridge University Press:  15 March 2011

Chun-Wen Kuo ,
Hui-Mei Hsieh ,
Jung-Chuan Ting ,
Yi-Hong Cho ,
Kung Hwa Wei  and
Peilin Chen
Chun-Wen Kuo
Affiliation:
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei 115, Taiwan Department of Material Science and Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan
Hui-Mei Hsieh
Affiliation:
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei 115, Taiwan Department of Material Science and Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan
Jung-Chuan Ting
Affiliation:
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei 115, Taiwan
Yi-Hong Cho
Affiliation:
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei 115, Taiwan
Kung Hwa Wei
Affiliation:
Department of Material Science and Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan
Peilin Chen*
Affiliation:
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei 115, Taiwan
*
Corresponding author: E-mail: peilin@gate.sinica.edu.tw, Tel:+886-2-2789-8000, Fax:+886-2-2782-6680
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Abstract

We have developed a fabrication procedure for growing photonic crystals in the lithographic defined microchannels, which enables easy integration with other planar optical components. This technique is based on the directed evaporation induced self-assembly of nanoparticles in the microchannels. Substrates with pre-patterned microchannels (30-100 μm wide) were dipped into solution of nanoparticles for several days. By controlling the evaporation rate, the meniscus contacting the microchannels will undergo evaporation-induced self-assembly. The capillary forces cause nanospheres to crystallize within the microchannels forming colloidal photonic crystals in the microchannels. Two types of colloidal particles, polystyrene and silica, have been employed to fabricate colloidal photonic crystals in the microchannels. Both types of colloidal particles were found to form large-area well-ordered colloidal single crystals in the microchannels. The optical reflection spectra from the (111) surfaces of the colloidal crystals formed by various sizes of nanoparticles have been measured. And the measured reflection peaks agree with the photonic bandgap calculated by the plane wave expansion method.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 817: Symposium L – New Materials for Microphotonics , 2004 , L6.2
Copyright
Copyright © Materials Research Society 2004

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