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  • 1
    Electronic Resource
    Electronic Resource
    Optical and Electrical Properties of Ferroelectric SBN Thin Films Prepared by Sol-Gel Process (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 611-614 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel ; strontium barium niobate ; thin film ; ferroelectric material ; optical waveguide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Strontium barium niobate thin films were prepared by sol-gel method on various substrates using an improved process, two-step heating process. The two-step heating process applies an additive heat-treatment before crystallization for enhancement of the densification and the nucleation of films. Also, highly c-axis oriented SBN thin films with various compositions were obtained on MgO(100) and Pt(100)/MgO(100) substrates. Their optical and electrical properties such as optical propagation loss, refractive index, P-E hysteresis, and dielectric constant, were characterized as a function of the film composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008721613449
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and Optical Properties of Silica-Poly(ethylene oxide) Hybrid Materials (1999)
    Springer
    Journal of sol gel science and technology 16 (1999), S. 235-241 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel ; silica-poly(ethylene oxide) hybrid material ; epoxide polymerization ; optical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Structural evolution and optical properties of the silica-poly(ethylene oxide) hybrid films prepared from γ-glycidoxypropyltrimethoxysilane (GPTS) and 1-methylimidazol (MI) are studied. Polymerization of the epoxy groups is achieved by using 1-methylimidazol as a thermal curing agent. In liquid state 1H &13 C NMR spectroscopy, it is found that silica condensation mainly occurs without epoxy ring opening. The epoxide polymerization is confirmed by using FT-IR, solid state CP-MAS 13C-NMR, and differential scanning calorimetry (DSC). The hybrid material is densified due to the epoxide polymerization as well as silica condensation with thermal curing. As a result, the thermal curing increases refractive index and extinction coefficient and shifts UV optical absorption edge to longer wavelength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008717219952
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Highly Oriented Sol-Gel (Pb, La) TiO3 Thin Film Optical Waveguides (1998)
    Springer
    Journal of sol gel science and technology 13 (1998), S. 869-870 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel ; lead lanthanum titanate ; thin film ; optical waveguide ; optical propagation loss
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The preparation and the optical characteristics of highly oriented PLT thin films are investigated. PLT films fabricated on MgO(100) and c-plane sapphire substrates have highly grown in (100) and (111) orientations, respectively. PLT films with high La content have a near cubic structure and weak anisotropy of refractive indices. The optical propagation losses of PLT films decrease as the La content of the films increases due to a complex interaction of surface roughness reduction and a reduction in the anisotropy refractive index. However, optical scattering in thicker sol-gel PLT thin film waveguides occurs by the internal scattering mechanism from the defects and the interfaces rather than by the surface scattering mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008610920804
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