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Unidirectional Enhanced Emission from 2D Monolayer Suspended by Dielectric Pillar Array
South China Normal Univ, South China Acad Adv Optoelect, Ctr Opt & Electromagnet Res, Guangzhou 510006, Guangdong, Peoples R China..
South China Normal Univ, South China Acad Adv Optoelect, Ctr Opt & Electromagnet Res, Guangzhou 510006, Guangdong, Peoples R China..
South China Normal Univ, South China Acad Adv Optoelect, Ctr Opt & Electromagnet Res, Guangzhou 510006, Guangdong, Peoples R China..
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering. South China Normal Univ, South China Acad Adv Optoelect, Ctr Opt & Electromagnet Res, Guangzhou 510006, Guangdong, Peoples R China.;Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, JORCEP, Hangzhou 310058, Zhejiang, Peoples R China..ORCID iD: 0000-0002-3401-1125
2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 41, p. 34817-34821Article in journal (Refereed) Published
Abstract [en]

Monolayers of transition metal dichalcogenides show great promise for optoelectronic devices as atomically thin semiconductors. Although dielectric or metal nanostructures have been extensively studied for tailoring and enhancing emission from monolayers, their applications are limited because of the mode concentrating inside the dielectric or the high optical losses in metals, together with the low quantum yield in monolayers. Here, we demonstrate that a metal-backed dielectric pillar array can suspend monolayers to increase the radiative recombination, and simultaneously, create strongly confined band-edge modes on surface directly accessible to monolayers. We observe unidirectional enhanced emission from WSe2 monolayers on polymer pillar array.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 10, no 41, p. 34817-34821
Keywords [en]
transition metal dichalcogenide, two-dimensional materials, unidirectional emission, surface mode, hybrid metal-dielectric nanostructure, band edge
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-238536DOI: 10.1021/acsami.8b12701ISI: 000447954600002PubMedID: 30281276Scopus ID: 2-s2.0-85055003971OAI: oai:DiVA.org:kth-238536DiVA, id: diva2:1260980
Note

QC 20181106

Available from: 2018-11-06 Created: 2018-11-06 Last updated: 2019-03-18Bibliographically approved

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He, Sailing

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