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Terahertz wave properties of alumina microphotonic crystals with a diamond structure

Published online by Cambridge University Press:  31 January 2011

Hideaki Kanaoka ,
Soshu Kirihara  and
Yoshinari Miyamoto
Hideaki Kanaoka
Affiliation:
Smart Processing Research Center, Joining and Welding Research Center, Osaka University, Ibaraki, Osaka 567-0047, Japan
Soshu Kirihara*
Affiliation:
Smart Processing Research Center, Joining and Welding Research Center, Osaka University, Ibaraki, Osaka 567-0047, Japan
Yoshinari Miyamoto
Affiliation:
Smart Processing Research Center, Joining and Welding Research Center, Osaka University, Ibaraki, Osaka 567-0047, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Fabrication and terahertz wave properties of alumina microphotonic crystals with a diamond structure were investigated. The three-dimensional diamond structure was designed on a computer using 3D-CAD software. The designed lattice constant was 500 μm. The structure consisted of 8 × 8 × 4 unit cells. Acrylic diamond structures with an alumina dispersion of 40 vol% were formed by using microstereolithography. Fabricated precursors were dewaxed at 600 °C and sintered at 1500 °C. The linear shrinkage ratio was about 25%. The relative density reached 97.5%. The electromagnetic wave properties were measured by terahertz time-domain spectroscopy. A complete photonic band gap was observed at the frequency range from 0.40 THz to 0.47 THz, and showed good agreement with the simulation results calculated by the plane wave expansion method. Moreover, localized modes were obtained at the frequencies 0.42 THz and 0.46 THz by introducing an air defect in the diamond structure. They corresponded to the simulation by the transmission line modeling method.

Keywords

Dielectric propertiesLithography (deposition)Microelectronics
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 1036 - 1041
Copyright
Copyright © Materials Research Society 2008

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References

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