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Preparation and spectroscopic studies of sol-gel derived GeO2/organically modified silane hybrid materials for optical waveguides

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Abstract

GeO2/organically modified silane organic-inorganic hybrid materials derived by a sol-gel technique were studied for optical waveguide applications. Acid-catalyzed solutions, firstly, γ-glycidoxypropyltrimetho-xysilane mixed with germanium isopropoxide, and secondly, methyltrimethoxysilane mixed with germanium isopropoxide were used as precursors. Optical and structural properties of the waveguide thin films prepared from the two types of sols were characterized by using the prism coupling technique, atomic force microscopy, thermal gravimetric analysis, UV-visible spectroscopy, and Fourier transform infrared. The obtained results indicate that in both cases, crack-free and highly transparent waveguide thin films with a thickness of more than 2-μm could be obtained by a single spin-coating process and at a low-temperature heat treatment of 100°C. A strong UV absorption region at short wavelength ∼200 nm, accompanied with a shoulder peaked at ∼240 nm, was also identified. It has been experimentally demonstrated that a channel waveguide structure could easily be fabricated from the hybrid sol-gel thin films by using reactive ion etching.

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Authors and Affiliations

  1. Nanotech Center, East China Normal University, 3663 Northern Zhongshan Road, Shanghai, 200062, People’s Republic of China

    Wenxiu Que, L. L. Wang, T. Chen & Z. Sun

  2. School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

    X. Hu

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  1. Wenxiu Que
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  2. L. L. Wang
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  3. T. Chen
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  4. Z. Sun
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  5. X. Hu
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Correspondence to Wenxiu Que.

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Que, W., Wang, L.L., Chen, T. et al. Preparation and spectroscopic studies of sol-gel derived GeO2/organically modified silane hybrid materials for optical waveguides. J Sol-Gel Sci Technol 38, 147–152 (2006). https://doi.org/10.1007/s10971-006-6571-3

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  • DOI: https://doi.org/10.1007/s10971-006-6571-3

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