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dc.contributor.authorPlanelles Fuster, Josep
dc.contributor.authorAchtstein, Alexander W.
dc.contributor.authorScott, Riccardo
dc.contributor.authorOwschimikow, Nina
dc.contributor.authorWoggon, Ulrike
dc.contributor.authorClimente, Juan I.
dc.date.accessioned2018-09-14T08:59:25Z
dc.date.available2018-09-14T08:59:25Z
dc.date.issued2018-08
dc.identifier.citationPlanelles, J., Achtstein, A., Scott, R., Owschimikow, N., Woggon, U., Climente, Juan I. Tuning Intraband and Interband Transition Rates via Excitonic Correlation in Low-Dimensional Semiconductors. ACS Photonics Article ASAP DOI: 10.1021/acsphotonics.8b00689ca_CA
dc.identifier.issn2330-4022
dc.identifier.urihttp://hdl.handle.net/10234/176051
dc.description.abstractWe show that electron-hole correlation can be used to tune interband and intra- band optical transition rates in semiconductor nanostructures with at least one weakly confined direction. The valence-to-conduction band transition rate can be enhanced by a factor (L/aB) N – with L the length of the weakly confined direction, aB the exciton Bohr radius and N the dimensionality of the nanostructure – while the rate of intraband and inter-valence-band transitions can be slowed down by the inverse factor, (aB/L) N . Adding a hitherto underexplored degree of freedom to engineer excitonic transition rates, this size dependence is of interest for various opto-electronic applica- tions. It also offers an interpretation of the superlinear volume scaling of two-photon absorption (TPA) cross-section recently reported for CdSe nanoplatelets, thus laying foundations to obtain unprecedented TPA cross sections, well above those of conven- tional two-photon absorbers. Further, our concept explains the background of the validity of the universal continuum absorption approach for the determination of par- ticle concentrations via the intrinsic absorption. Potential applications of our approach include low excitation intensity confocal two-photon imaging, two-photon autocorre- lation and cross correlation with much higher sensitivity and unprecedented temporal resolution as well as TPA based optical stabilization and optimizing of inter-subband transition rates in quantum cascade lasers.ca_CA
dc.format.extent40 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherACS Publicationsca_CA
dc.relation.isPartOfACS Photonicsca_CA
dc.rightsCopyright © 2018 American Chemical Societyca_CA
dc.subjectexciton interactionca_CA
dc.subjectintraband absorptionca_CA
dc.subjecttwo-photon absorptionca_CA
dc.subjectnanoplateletsca_CA
dc.subjectk·p theoryca_CA
dc.titleTuning intraband and interband transition rates via excitonic correlation in low-dimensional semiconductorsca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1021/acsphotonics.8b00689
dc.relation.projectIDMINECO project CTQ2017-83781-P; UJI project B2017-59; R.S., N.O., U.W. and A.W.A acknowledge DFG grants WO477-1/32 and AC290-1/1 and 2/1.ca_CA
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttps://pubs.acs.org/doi/10.1021/acsphotonics.8b00689ca_CA
dc.type.versioninfo:eu-repo/semantics/acceptedVersionca_CA


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