DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Kyoung-Duck | - |
dc.contributor.author | Jiang, Tao | - |
dc.contributor.author | Clark, Genevieve | - |
dc.contributor.author | Xu, Xiaodong | - |
dc.contributor.author | Raschke, Markus B. | - |
dc.date.accessioned | 2022-12-26T01:20:51Z | - |
dc.date.available | 2022-12-26T01:20:51Z | - |
dc.date.created | 2022-12-23 | - |
dc.date.issued | 2018-01 | - |
dc.identifier.issn | 1748-3387 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/114702 | - |
dc.description.abstract | Excitons, Coulomb-bound electron-hole pairs, are elementary photo-excitations in semiconductors that can couple to light through radiative relaxation. In contrast, dark excitons (X-D) show anti-parallel spin configuration with generally forbidden radiative emission. Because of their long lifetimes, these dark excitons are appealing candidates for quantum computing and optoelectronics. However, optical read-out and control of XD states has remained challenging due to their decoupling from light. Here, we present a tip-enhanced nano-optical approach to induce, switch and programmably modulate the XD emission at room temperature. Using a monolayer transition metal dichalcogenide (TMD) WSe2 on a gold substrate, we demonstrate similar to 6 x 10(5)-fold enhancement in dark exciton photoluminescence quantum yield achieved through coupling of the antenna-tip to the dark exciton out-of-plane optical dipole moment, with a large Purcell factor of >= 2 x 10(3) of the tip-sample nano-cavity. Our approach provides a facile way to harness excitonic properties in low-dimensional semiconductors offering new strategies for quantum optoelectronics. | - |
dc.language | English | - |
dc.publisher | Nature Publishing Group | - |
dc.relation.isPartOf | Nature Nanotechnology | - |
dc.title | Radiative control of dark excitons at room temperature by nano-optical antenna-tip Purcell effect | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41565-017-0003-0 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Nature Nanotechnology, v.13, no.1, pp.59 - 64 | - |
dc.identifier.wosid | 000419783900020 | - |
dc.citation.endPage | 64 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 59 | - |
dc.citation.title | Nature Nanotechnology | - |
dc.citation.volume | 13 | - |
dc.contributor.affiliatedAuthor | Park, Kyoung-Duck | - |
dc.identifier.scopusid | 2-s2.0-85034596515 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | MONOLAYER | - |
dc.subject.keywordPlus | ENHANCEMENT | - |
dc.subject.keywordPlus | PHOTOLUMINESCENCE | - |
dc.subject.keywordPlus | TRANSITION | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | WSE2 | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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