Near-infrared high refractive-index three-dimensional inverse woodpile photonic crystals generated by a sol-gel process

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Title: Near-infrared high refractive-index three-dimensional inverse woodpile photonic crystals generated by a sol-gel process
Author(s): Jia, Baohua; Wu, Shuhui; Li, Jiafang; Gu, Min
Abstract: We demonstrate the formation of complete pieces of high refractive-index three-dimensional inverse woodpile photonic crystals by a simple and inexpensive sol-gel process. A mixture of the titanium dioxide precursor and the silica dioxide precursor was infiltrated multiple times into a polymeric template produced by two-photon polymerization to improve the mechanical properties of the inverse structure. After removal of the polymer template, transparent inverse photonic crystals with a refractive index of approximately 2.2 were achieved. The spectroscopic characterization reveals a stop gap in the near-infrared wavelength range, agreeing with the theoretical prediction.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Journal of Applied Physics, Vol. 102, no. 9 (2007), Article no. 096102
Publication year: 2007
Keyword(s): Fourier transform spectra; Infrared spectra; Photonic crystals; Refractive index; Sol-gel processing
Publisher: American Institute of Physics
ISSN: 0021-8979
Publisher URL: http://dx.doi.org/10.1063/1.2803714
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