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Excitation spectrum for ultrafast photogeneration of charged solitons in polyacetylene

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dc.contributor.authorMiranda, P. B.
dc.contributor.authorMoses, D.
dc.contributor.authorPark, Y. W.
dc.contributor.authorHeeger, A. J.
dc.contributor.institutionUniv Calif Santa Barbara
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionSeoul Natl Univ
dc.date.accessioned2014-05-20T15:24:12Z
dc.date.available2014-05-20T15:24:12Z
dc.date.issued2003-04-04
dc.description.abstractUltrafast photoinduced absorption by IRAV modes is used to detect charged solitons in oriented polyacetylene. We find that soliton pairs are photogenerated within our time resolution of similar to250 fs with similar to100% quantum efficiency (phi(ch)). The excitation spectrum of phi(ch) shows an onset at 1.0 eV, with a weak photon energy dependence up to 4.7 eV. These results agree with the ultrafast soliton formation predicted by Su and Schrieffer and with the SSH threshold of 2E(g)/pi for soliton pair production.en
dc.description.affiliationUniv Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA
dc.description.affiliationUniv Estadual Paulista, Dept Fis, Fac Ciências, BR-17015970 Bauru, SP, Brazil
dc.description.affiliationSeoul Natl Univ, Sch Phys, Seoul 151747, South Korea
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fis, Fac Ciências, BR-17015970 Bauru, SP, Brazil
dc.format.extent445-446
dc.identifierhttp://dx.doi.org/10.1016/S0379-6779(02)00600-8
dc.identifier.citationSynthetic Metals. Lausanne: Elsevier B.V. Sa, v. 135, n. 1-3, p. 445-446, 2003.
dc.identifier.doi10.1016/S0379-6779(02)00600-8
dc.identifier.issn0379-6779
dc.identifier.urihttp://hdl.handle.net/11449/34848
dc.identifier.wosWOS:000182533700207
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSynthetic Metals
dc.relation.ispartofjcr2.526
dc.relation.ispartofsjr0,672
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjecttime-resolved fast spectroscopypt
dc.subjectphotoinduced absorption spectroscopypt
dc.subjectpolyacetylene and derivativespt
dc.subjectsemiconducting filmspt
dc.subjecttensile drawingpt
dc.subjectphotoconductivitypt
dc.titleExcitation spectrum for ultrafast photogeneration of charged solitons in polyacetyleneen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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