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Article: Intrinsic donor-bound excitons in ultraclean monolayer semiconductors

TitleIntrinsic donor-bound excitons in ultraclean monolayer semiconductors
Authors
Issue Date2021
PublisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2021, v. 12 n. 1, p. article no. 871 How to Cite?
AbstractThe monolayer transition metal dichalcogenides are an emergent semiconductor platform exhibiting rich excitonic physics with coupled spin-valley degree of freedom and optical addressability. Here, we report a new series of low energy excitonic emission lines in the photoluminescence spectrum of ultraclean monolayer WSe2. These excitonic satellites are composed of three major peaks with energy separations matching known phonons, and appear only with electron doping. They possess homogenous spatial and spectral distribution, strong power saturation, and anomalously long population (>6 µs) and polarization lifetimes (>100 ns). Resonant excitation of the free inter- and intravalley bright trions leads to opposite optical orientation of the satellites, while excitation of the free dark trion resonance suppresses the satellitesʼ photoluminescence. Defect-controlled crystal synthesis and scanning tunneling microscopy measurements provide corroboration that these features are dark excitons bound to dilute donors, along with associated phonon replicas. Our work opens opportunities to engineer homogenous single emitters and explore collective quantum optical phenomena using intrinsic donor-bound excitons in ultraclean 2D semiconductors.
Persistent Identifierhttp://hdl.handle.net/10722/298793
ISSN
2023 Impact Factor: 14.7
2023 SCImago Journal Rankings: 4.887
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRivera, P-
dc.contributor.authorHe, M-
dc.contributor.authorKim, B-
dc.contributor.authorLiu, S-
dc.contributor.authorRubio-Verdú, C-
dc.contributor.authorMoon, H-
dc.contributor.authorMennel, L-
dc.contributor.authorRhodes, DA-
dc.contributor.authorYu, H-
dc.contributor.authorTaniguchi, T-
dc.contributor.authorWatanabe, K-
dc.contributor.authorYan, J-
dc.contributor.authorMandrus, DG-
dc.contributor.authorDery, H-
dc.contributor.authorPasupathy, A-
dc.contributor.authorEnglund, D-
dc.contributor.authorHone, J-
dc.contributor.authorYao, W-
dc.contributor.authorXu, X-
dc.date.accessioned2021-04-12T03:03:27Z-
dc.date.available2021-04-12T03:03:27Z-
dc.date.issued2021-
dc.identifier.citationNature Communications, 2021, v. 12 n. 1, p. article no. 871-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/298793-
dc.description.abstractThe monolayer transition metal dichalcogenides are an emergent semiconductor platform exhibiting rich excitonic physics with coupled spin-valley degree of freedom and optical addressability. Here, we report a new series of low energy excitonic emission lines in the photoluminescence spectrum of ultraclean monolayer WSe2. These excitonic satellites are composed of three major peaks with energy separations matching known phonons, and appear only with electron doping. They possess homogenous spatial and spectral distribution, strong power saturation, and anomalously long population (>6 µs) and polarization lifetimes (>100 ns). Resonant excitation of the free inter- and intravalley bright trions leads to opposite optical orientation of the satellites, while excitation of the free dark trion resonance suppresses the satellitesʼ photoluminescence. Defect-controlled crystal synthesis and scanning tunneling microscopy measurements provide corroboration that these features are dark excitons bound to dilute donors, along with associated phonon replicas. Our work opens opportunities to engineer homogenous single emitters and explore collective quantum optical phenomena using intrinsic donor-bound excitons in ultraclean 2D semiconductors.-
dc.languageeng-
dc.publisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsNature Communications. Copyright © Nature Research: Fully open access journals.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleIntrinsic donor-bound excitons in ultraclean monolayer semiconductors-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYu, H=rp02112-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-021-21158-8-
dc.identifier.pmid33558508-
dc.identifier.pmcidPMC7870970-
dc.identifier.scopuseid_2-s2.0-85100608119-
dc.identifier.hkuros322162-
dc.identifier.volume12-
dc.identifier.issue1-
dc.identifier.spagearticle no. 871-
dc.identifier.epagearticle no. 871-
dc.identifier.isiWOS:000625204500026-
dc.publisher.placeUnited Kingdom-

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