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- Publisher Website: 10.1021/acsphotonics.8b00381
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Article: Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer
Title | Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer |
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Authors | |
Keywords | 2D materials metal optics nanoLED nanophotonics optical antenna |
Issue Date | 2018 |
Publisher | American 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? |
Abstract | Optical 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 Identifier | http://hdl.handle.net/10722/262564 |
ISSN | 2023 Impact Factor: 6.5 2023 SCImago Journal Rankings: 2.089 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Eggleston, MS | - |
dc.contributor.author | Desai, SB | - |
dc.contributor.author | Messer, K | - |
dc.contributor.author | Fortuna, SA | - |
dc.contributor.author | Madhvapathy, S | - |
dc.contributor.author | Xiao, J | - |
dc.contributor.author | Zhang, X | - |
dc.contributor.author | Yablonovitch, E | - |
dc.contributor.author | Javey, A | - |
dc.contributor.author | Wu, MC | - |
dc.date.accessioned | 2018-10-02T04:38:04Z | - |
dc.date.available | 2018-10-02T04:38:04Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | ACS Photonics, 2018, v. 5 n. 7, p. 2701-2705 | - |
dc.identifier.issn | 2330-4022 | - |
dc.identifier.uri | http://hdl.handle.net/10722/262564 | - |
dc.description.abstract | Optical 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.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/toc/apchd5/2/4 | - |
dc.relation.ispartof | ACS Photonics | - |
dc.rights | This 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.subject | 2D materials | - |
dc.subject | metal optics | - |
dc.subject | nanoLED | - |
dc.subject | nanophotonics | - |
dc.subject | optical antenna | - |
dc.title | Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe2 Monolayer | - |
dc.type | Article | - |
dc.identifier.email | Zhang, X: president@hku.hk | - |
dc.identifier.authority | Zhang, X=rp02411 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acsphotonics.8b00381 | - |
dc.identifier.scopus | eid_2-s2.0-85048371759 | - |
dc.identifier.volume | 5 | - |
dc.identifier.issue | 7 | - |
dc.identifier.spage | 2701 | - |
dc.identifier.epage | 2705 | - |
dc.identifier.isi | WOS:000439532600024 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 2330-4022 | - |