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dc.contributor.authorPandya, Raj
dc.contributor.authorAshoka, Arjun
dc.contributor.authorGeorgiou, Kyriacos
dc.contributor.authorSung, Jooyoung
dc.contributor.authorJayaprakash, Rahul
dc.contributor.authorRenken, Scott
dc.contributor.authorGai, Lizhi
dc.contributor.authorShen, Zhen
dc.contributor.authorRao, Akshay
dc.contributor.authorMusser, Andrew J
dc.date.accessioned2022-04-27T11:00:13Z
dc.date.available2022-04-27T11:00:13Z
dc.date.issued2022-06
dc.date.submitted2021-12-02
dc.identifier.issn2198-3844
dc.identifier.otheradvs3829
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/336503
dc.descriptionFunder: EPSRC; Id: http://dx.doi.org/10.13039/501100000266
dc.descriptionFunder: U.S. Department of Energy; Id: http://dx.doi.org/10.13039/100000015
dc.descriptionFunder: Office of Science; Id: http://dx.doi.org/10.13039/100006132
dc.descriptionFunder: Basic Energy Sciences; Id: http://dx.doi.org/10.13039/100006151
dc.description.abstractWhile there have been numerous reports of long-range polariton transport at room-temperature in organic cavities, the spatiotemporal evolution of the propagation is scarcely reported, particularly in the initial coherent sub-ps regime, where photon and exciton wavefunctions are inextricably mixed. Hence the detailed process of coherent organic exciton-polariton transport and, in particular, the role of dark states has remained poorly understood. Here, femtosecond transient absorption microscopy is used to directly image coherent polariton motion in microcavities of varying quality factor. The transport is found to be well-described by a model of band-like propagation of an initially Gaussian distribution of exciton-polaritons in real space. The velocity of the polaritons reaches values of ≈ 0.65 × 106 m s-1 , substantially lower than expected from the polariton dispersion. Further, it is found that the velocity is proportional to the quality factor of the microcavity. This unexpected link between the quality-factor and polariton velocity is suggested to be a result of varying admixing between delocalized dark and polariton states.
dc.languageen
dc.publisherWiley
dc.subjectResearch Article
dc.subjectResearch Articles
dc.subjectcoherent transport
dc.subjectdark states
dc.subjectenergy transport
dc.subjectexciton‐polaritons
dc.subjectQ‐factor
dc.subjectTA microscopy
dc.titleTuning the Coherent Propagation of Organic Exciton-Polaritons through Dark State Delocalization.
dc.typeArticle
dc.date.updated2022-04-27T11:00:12Z
prism.publicationNameAdv Sci (Weinh)
dc.identifier.doi10.17863/CAM.83920
rioxxterms.versionofrecord10.1002/advs.202105569
rioxxterms.versionAO
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidMusser, Andrew J [0000-0002-4600-6606]
dc.identifier.eissn2198-3844
pubs.funder-project-idEarly Career Research Program (DE‐SC0021941))
cam.issuedOnline2022-04-27
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.83114


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