Excitation spectrum for ultrafast photogeneration of charged solitons in polyacetylene

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMiranda, P. B.
dc.creatorMoses, D.
dc.creatorPark, Y. W.
dc.creatorHeeger, A. J.
dc.date2014-05-20T15:24:12Z
dc.date2016-10-25T17:58:21Z
dc.date2014-05-20T15:24:12Z
dc.date2016-10-25T17:58:21Z
dc.date2003-04-04
dc.date.accessioned2017-04-05T23:46:04Z
dc.date.available2017-04-05T23:46:04Z
dc.identifierSynthetic Metals. Lausanne: Elsevier B.V. Sa, v. 135, n. 1-3, p. 445-446, 2003.
dc.identifier0379-6779
dc.identifierhttp://hdl.handle.net/11449/34848
dc.identifierhttp://acervodigital.unesp.br/handle/11449/34848
dc.identifier10.1016/S0379-6779(02)00600-8
dc.identifierWOS:000182533700207
dc.identifierhttp://dx.doi.org/10.1016/S0379-6779(02)00600-8
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/878696
dc.descriptionUltrafast 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.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationSynthetic Metals
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjecttime-resolved fast spectroscopy
dc.subjectphotoinduced absorption spectroscopy
dc.subjectpolyacetylene and derivatives
dc.subjectsemiconducting films
dc.subjecttensile drawing
dc.subjectphotoconductivity
dc.titleExcitation spectrum for ultrafast photogeneration of charged solitons in polyacetylene
dc.typeOtro


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