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dc.contributor.authorChang, CJen_US
dc.contributor.authorWang, HCen_US
dc.contributor.authorLiao, GYen_US
dc.contributor.authorWhang, WTen_US
dc.contributor.authorLiu, JMen_US
dc.contributor.authorHsu, KYen_US
dc.date.accessioned2014-12-08T15:01:29Z-
dc.date.available2014-12-08T15:01:29Z-
dc.date.issued1997-09-01en_US
dc.identifier.issn0032-3861en_US
dc.identifier.urihttp://hdl.handle.net/11536/334-
dc.description.abstractThe photoconductivity and photorefractive characteristics of PMDA-DR19-based photoconducting nonlinear optical polymeric films with different compositions were studied using red and green lasers. Contributions of dopants and the host to the photoconductive and photorefractive properties are systematically discussed. The virgin nonlinear optical material PMDA-DR19 was neither photoconductive nor photorefractive in nature. However, it became photoconductive and photorefractive once the charge transport material was incorporated into the PMDA-DR19/PVB polymer film. Films containing more nonlinear optical chromophore exhibited higher diffraction efficiency. Response speed was further elevated when an additional charge generation material was doped in. Diffraction grating was observed under zero electric field and was confirmed due to a photorefractive effect by the two-beam coupling effect. In addition to composition modification, the laser light source was also an important factor in changing the PR response speed. The photorefractive response speed was tremendously improved when films were written and read by two different laser beams, either red/green lasers or green/red lasers. (C) 1997 Elsevier Science Ltd.en_US
dc.language.isoen_USen_US
dc.subjectphotoconductiveen_US
dc.subjectphotorefractiveen_US
dc.subjectPMDA-DR19en_US
dc.titleThe effect of laser wavelength on the photorefractive characteristics of PMDA-DR19 based photorefractive polymeric materialsen_US
dc.typeArticleen_US
dc.identifier.journalPOLYMERen_US
dc.citation.volume38en_US
dc.citation.issue20en_US
dc.citation.spage5063en_US
dc.citation.epage5071en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.contributor.departmentDepartment of Photonicsen_US
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