Exciton-exciton annihilation in MoSe2 monolayers

Kumar, Nardeep; Cui, Qiannan; Ceballos, Frank; He, Dawei; Wang, Yongsheng; Zhao, Hui

dc.contributor.author	Kumar, Nardeep
dc.contributor.author	Cui, Qiannan
dc.contributor.author	Ceballos, Frank
dc.contributor.author	He, Dawei
dc.contributor.author	Wang, Yongsheng
dc.contributor.author	Zhao, Hui
dc.date.accessioned	2015-12-17T21:45:21Z
dc.date.available	2015-12-17T21:45:21Z
dc.date.issued	2014-03-24
dc.identifier.citation	Kumar, Nardeep, Qiannan Cui, Frank Ceballos, Dawei He, Yongsheng Wang, and Hui Zhao. "Exciton-exciton Annihilation in MoSe 2 Monolayers." Phys. Rev. B Physical Review B 89.12 (2014). http://dx.doi.org/10.1103/PhysRevB.89.125427	en_US
dc.identifier.uri	http://hdl.handle.net/1808/19258
dc.description	This is the published version. Copyright ©2014 American Physical Society	en_US
dc.description.abstract	We investigate the excitonic dynamics in MoSe2 monolayer and bulk samples by femtosecond transient absorption. Excitons are resonantly injected by a 750-nm and 100-fs laser pulse, and are detected by measuring a differential reflection of a probe pulse tuned in the range 790–820 nm. We observe a strong density-dependent initial decay of the exciton population in monolayers, which can be well described by the exciton-exciton annihilation. Such a feature is not observed in a bulk sample under comparable conditions. We also observe the saturated absorption induced by excitons in both monolayers and the bulk in the differential reflection measurements, which indicates their potential applications as saturable absorbers.	en_US
dc.publisher	American Physical Society	en_US
dc.title	Exciton-exciton annihilation in MoSe2 monolayers	en_US
dc.type	Article
kusw.kuauthor	Zhao, Hui
kusw.kudepartment	Physics and Astronomy	en_US
dc.identifier.doi	10.1103/PhysRevB.89.125427
dc.identifier.orcid	https://orcid.org/0000-0002-8078-6669
kusw.oaversion	Scholarly/refereed, publisher version
kusw.oapolicy	This item meets KU Open Access policy criteria.
dc.rights.accessrights	openAccess

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