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Indexed by:期刊论文

Date of Publication:2008-03-01

Journal:JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY

Included Journals:SCIE、EI

Volume:45

Issue:3

Page Number:232-237

ISSN No.:1060-1325

Key Words:hybrid material; sol-gel; waveguide; hybrid polymerization

Abstract:Silicate-based inorganic-organic hybrid polymer systems have many unique properties including thermal stability and photo-stability, chemical resistance with the combination of tunable optical properties. Two kinds of new UV-patternable hybrid materials PSQ-Ls were synthesized by a sol-gel process at room temperature, which can be used for low cost fabrication of optical waveguides. Thick films (up to 8.31 mu m) can be coated by a single spin-coating process without any cracking and the average surface roughness (Ra), detected by atomic force microscopy (AFM), is below 0.5 nm. The optical properties (refractive index, birefringence, and optical loss at 1310 nm and 1550 nm, respectively) of the PSQ-Ls films are investigated by a prism coupler. The refractive index of PSQ-Ls can be exactly tuned from 1.4483 to 1.5212 by blending PSQ-LH (n(TE)=1.5212 @ 1310 nm) and PSQ-LL (n(TE)=1.4483 @ 1310 nm). The maximum refractive index contrast is about 4.8%. After post-baking, birefringences of the films are below 0.0005 and optical losses are about 0.2 dB.cm(-1) at 1310 nm, 0.7 dB.cm(-1) at 1550 nm, respectively. Furthermore, the PSQ-Ls films also show outstanding thermal stability in air atmospheres.