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dc.contributor.authorUsman, Anwaren_US
dc.contributor.authorUwada, Takayukien_US
dc.contributor.authorMasuhara, Hiroshien_US
dc.date.accessioned2014-12-08T15:31:46Z-
dc.date.available2014-12-08T15:31:46Z-
dc.date.issued2011-06-23en_US
dc.identifier.issn1932-7447en_US
dc.identifier.urihttp://dx.doi.org/10.1021/jp200721fen_US
dc.identifier.urihttp://hdl.handle.net/11536/22475-
dc.description.abstractWe report on observation of optical reorientation of homogeneous nematic liquid crystals (LCs) thin slab of 4'-penthyl-4-cyanobiphenyl induced by a tightly focused nearinfrared laser beam. We found that for laser beam with intensity higher than 56 MW/cm(2) the optical reorientation unusually transforms to a new metastable domain, which grows with laser irradiation time up to a dimension much larger than that of the focal spot. The optically reoriented LCs with refractive index mismatch compared to the surroundings can act as a micrometer-sized "ghost particle", leading to the generation of optical trapping and manipulation of the optically reoriented LCs. By using confocal Raman microspectroscopy, we show that the dichroic ratio in the confined focal volume changes upon the domain formation with an increase in the total Raman intensity, indicating that microscopic depolarization leading to deorientation or nematic isotropic phase transition and possible microscopic densification takes place by the tightly focused laser beam.en_US
dc.language.isoen_USen_US
dc.titleOptical Reorientation and Trapping of Nematic Liquid Crystals Leading to the Formation of Micrometer-Sized Domainen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/jp200721fen_US
dc.identifier.journalJOURNAL OF PHYSICAL CHEMISTRY Cen_US
dc.citation.volume115en_US
dc.citation.issue24en_US
dc.citation.spage11906en_US
dc.citation.epage11913en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.department應用化學系分子科學碩博班zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.contributor.departmentInstitute of Molecular scienceen_US
dc.identifier.wosnumberWOS:000291709600003-
dc.citation.woscount5-
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