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Article: Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer

TitleUltrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer
Authors
Keywords2D materials
metal optics
nanoLED
nanophotonics
optical antenna
Issue Date2018
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/toc/apchd5/2/4
Citation
ACS Photonics, 2018, v. 5 n. 7, p. 2701-2705 How to Cite?
AbstractOptical antennas can enhance the spontaneous emission rate from nanoemitters by orders of magnitude, enabling the possibility of an ultrafast, efficient, nanoscale LED. Semiconductors would be the preferred material for such a device to allow for direct high-speed modulation. However, efficient nanoscale devices are challenging to implement because of high surface recombination typical of most III–V materials. Monolayer transition metal dichalcogenides are an attractive alternative to a III–V emitter due to their intrinsically nanoscale dimensions, direct bandgap, and near-ideal surfaces resulting in high intrinsic quantum yield. In this work, we couple a nanostrip (30 nm × 250 nm) monolayer of WSe2 to a cavity-backed optical slot antenna through a self-aligned fabrication process. Photoluminescence, scattering, and lifetime measurements are used to estimate a radiative spontaneous emission rate enhancement of 318× from WSe2 monolayers coupled to on-resonance antennas. Such a huge increase in the spontaneous emission rate results in an ultrafast radiative recombination rate and a quantum yield in nanopatterned monolayers comparable to unprocessed exfoliated flakes of WSe2.
Persistent Identifierhttp://hdl.handle.net/10722/262564
ISSN
2017 Impact Factor: 6.88
2015 SCImago Journal Rankings: 3.475
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorEggleston, MS-
dc.contributor.authorDesai, SB-
dc.contributor.authorMesser, K-
dc.contributor.authorFortuna, SA-
dc.contributor.authorMadhvapathy, S-
dc.contributor.authorXiao, J-
dc.contributor.authorZhang, X-
dc.contributor.authorYablonovitch, E-
dc.contributor.authorJavey, A-
dc.contributor.authorWu, MC-
dc.date.accessioned2018-10-02T04:38:04Z-
dc.date.available2018-10-02T04:38:04Z-
dc.date.issued2018-
dc.identifier.citationACS Photonics, 2018, v. 5 n. 7, p. 2701-2705-
dc.identifier.issn2330-4022-
dc.identifier.urihttp://hdl.handle.net/10722/262564-
dc.description.abstractOptical antennas can enhance the spontaneous emission rate from nanoemitters by orders of magnitude, enabling the possibility of an ultrafast, efficient, nanoscale LED. Semiconductors would be the preferred material for such a device to allow for direct high-speed modulation. However, efficient nanoscale devices are challenging to implement because of high surface recombination typical of most III–V materials. Monolayer transition metal dichalcogenides are an attractive alternative to a III–V emitter due to their intrinsically nanoscale dimensions, direct bandgap, and near-ideal surfaces resulting in high intrinsic quantum yield. In this work, we couple a nanostrip (30 nm × 250 nm) monolayer of WSe2 to a cavity-backed optical slot antenna through a self-aligned fabrication process. Photoluminescence, scattering, and lifetime measurements are used to estimate a radiative spontaneous emission rate enhancement of 318× from WSe2 monolayers coupled to on-resonance antennas. Such a huge increase in the spontaneous emission rate results in an ultrafast radiative recombination rate and a quantum yield in nanopatterned monolayers comparable to unprocessed exfoliated flakes of WSe2.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/toc/apchd5/2/4-
dc.relation.ispartofACS Photonics-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subject2D materials-
dc.subjectmetal optics-
dc.subjectnanoLED-
dc.subjectnanophotonics-
dc.subjectoptical antenna-
dc.titleUltrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer-
dc.typeArticle-
dc.identifier.emailZhang, X: president@hku.hk-
dc.identifier.authorityZhang, X=rp02411-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acsphotonics.8b00381-
dc.identifier.scopuseid_2-s2.0-85048371759-
dc.identifier.volume5-
dc.identifier.issue7-
dc.identifier.spage2701-
dc.identifier.epage2705-
dc.identifier.isiWOS:000439532600024-
dc.publisher.placeUnited States-

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