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Proceedings Paper

Organic-inorganic composites for THz device fabrication
Author(s): B. Cai; T. M. Ye; G. Bo; X. C. Wang; Y. Z. Li; Y. M. Zhu; O. Sugihara
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Paper Abstract

In this paper, several organic-inorganic composites were prepared for Terahertz (THz) devices fabrication. First, a two-layer structure was designed for femtosecond (fs) laser/THz radiation separation. The top layer was made by sintered 20-40 nm hollow quartz particles which can diffuse the incident fs laser thus decrease the power intensity. The bottom layer comprised of silicon 100 nm particles and cycle-olefine polymer (COP), by which the fs laser light can be greatly scattered and absorbed but THz radiation can propagate insusceptibly. With this two-layer structure a high efficient fs-laser/THz filter was fabricated successfully. Second, titania–polymer composites with a very high refractiveindex tunability and high transparency in the THz region were prepared. By controlling the blending ratio of the titania particle, a broad refractive-index tuning range from 1.5 to 3.1 was realized. Then, the composites were used to fabricate antireflective (AR) layers on a high-resistivity silicon (HR-Si) substrate. By utilizing the thermoplasticity of the titania– polymer composite, a graded-index structure was fabricated via a hot-embossing method. Because of the good refractive-index matching between the composite and the HR-Si substrate, a broadband AR layer was fabricated.

Paper Details

Date Published: 24 February 2016
PDF: 7 pages
Proc. SPIE 9745, Organic Photonic Materials and Devices XVIII, 974517 (24 February 2016); doi: 10.1117/12.2218782
Show Author Affiliations
B. Cai, Univ. of Shanghai for Science and Technology (China)
Utsunomiya Univ. (Japan)
T. M. Ye, Univ. of Shanghai for Science and Technology (China)
G. Bo, Univ. of Shanghai for Science and Technology (China)
X. C. Wang, Univ. of Shanghai for Science and Technology (China)
Y. Z. Li, Univ. of Shanghai for Science and Technology (China)
Y. M. Zhu, Univ. of Shanghai for Science and Technology (China)
O. Sugihara, Utsunomiya Univ. (Japan)

Published in SPIE Proceedings Vol. 9745:
Organic Photonic Materials and Devices XVIII
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)

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