Semicrystalline woodpile photonic crystals without complicated alignment via soft lithography

Date
2010-01-01
Authors
Lee, Jae-Hwang
Kuang, Ping
Leung, Wai
Kim, Yong-Sung
Park, Joong Mok
Kang, Henry
Constant, Kristen
Ho, Kai-Ming
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Abstract

We report the fabrication and characterization of woodpile photonic crystals with up to 12 layers through titania nanoparticle infiltration of a polymer template made by soft lithography. Because the complicated alignment in the conventional layer-by-layer fabrication associated with diamondlike symmetry is replaced by a simple 90° alignment, the fabricatedphotonic crystal has semicrystalline phase. However, the crystal performs similarly to a perfectly aligned crystal for the light propagation integrated from the surface normal to 30° at the main photonic band gap.

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The following article appeared in Applied Physics Letters 96 (2010): 193303 and may be found at http://dx.doi.org/10.1063/1.3425756.

Keywords
Ames Laboratory, Physics and Astronomy, Photonic crystals, Slurries, Silicon, Photonic bandgap materials, Reflectivity
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