DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hwan Kyu Kim | ko |
dc.contributor.author | Su-Jin Kang | ko |
dc.contributor.author | Sam-Kwon Choi | ko |
dc.contributor.author | Yu-Hong Min | ko |
dc.contributor.author | Yoon, Choon Sup | ko |
dc.date.accessioned | 2013-03-03T01:09:12Z | - |
dc.date.available | 2013-03-03T01:09:12Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1999 | - |
dc.identifier.citation | CHEMISTRY OF MATERIALS, v.11, no.0, pp.779 - 788 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/10203/76409 | - |
dc.description.abstract | The thermally stable second-order nonlinear optic (NLO) hybrid materials were successfully prepared by a sol−gel process using dye-attached sol−gel monomers (ormosils) of difunctionalized or trifunctionalized second-order NLO chromophores attached to silicon atoms. The dye-attached sol−gel monomers were synthesized by the coupling reaction of 3-isocyanatopropyltriethoxysilane with the corresponding functionalized NLO chromophores in DMAc. The dye-attached sol−gel monomers were homopolymerized and copolymerized with TEOS by hydrolysis and polycondensation in the presence of a slight excess amount of acidified water (pH 3), yielding the hybrid precusors (or a homogeneous solution). The hybrid precursors were spin-coated on various substrates such as ITO glass and NaCl disk. Hybrid films were further polycondensed by curing at 170 °C for 3 h. The cured hybrid materials existed in monohydroxy (T2, Q3) and nonhydroxy (T3, Q4) states, indicating the formation of a highly cross-linked silicon−oxygen polymeric network. All of the cured organic/SiO2 hybrid films are transparent. The organic/SiO2 hybrid materials were quite stable at elevated temperatures above 250 °C. The hybrid films were poled by corona discharge technique or dc contact electrode. The values of electro-optic coefficient for the organic/SiO2 hybrid materials were in the range of 3.7 to 16 pm/V at the wavelength of 1.3 μm, depending on dye-attached sol−gel monomers and poling conditions. The SG-DANS (1:2:2) film shows excellent temporal stability. The r33 signal remained at 80% of its initial value after heating even at 150 °C for 3 h. Also, the second-order nonlinear optical coefficient d31 of 72 pm/V for the SG-DANS (1:2:0) hybrid film measured by the Maker fringe technique was obtained. The refractive index was decreased after photobleaching. Using the hybrid film, a single-mode channel waveguide was also fabricated by the photobleaching method. The mode pattern confirmed that a channel waveguide was single-mode, and the optical propagation loss was measured to be less than 1 dB/cm. | - |
dc.language | English | - |
dc.publisher | Amer Chemical Soc | - |
dc.title | Highly Efficient Organic/Inorganic Hybrid Nonlinear Optic Materials via Sol−Gel Process: Synthesis, Optical Properties, and Photobleaching for Channel Waveguides | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.citation.volume | 11 | - |
dc.citation.issue | 0 | - |
dc.citation.beginningpage | 779 | - |
dc.citation.endingpage | 788 | - |
dc.citation.publicationname | CHEMISTRY OF MATERIALS | - |
dc.contributor.localauthor | Yoon, Choon Sup | - |
dc.contributor.nonIdAuthor | Hwan Kyu Kim | - |
dc.contributor.nonIdAuthor | Su-Jin Kang | - |
dc.contributor.nonIdAuthor | Sam-Kwon Choi | - |
dc.contributor.nonIdAuthor | Yu-Hong Min | - |
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