Enhanced Emission from WSe<inf>2</inf> Monolayers Coupled to Circular Bragg Gratings

Duong, NMH; Xu, ZQ; Kianinia, M; Su, R; Liu, Z; Kim, S; Bradac, C; Tran, TT; Wan, Y; Li, LJ; Solntsev, A; Liu, J; Aharonovich, I

Enhanced Emission from WSe<inf>2</inf> Monolayers Coupled to Circular Bragg Gratings

Duong, NMH Xu, ZQ

Kianinia, M Su, R Liu, Z Kim, S

Bradac, C

Tran, TT

Wan, Y Li, LJ Solntsev, A

Liu, J Aharonovich, I

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Publication Type:: Journal Article
Citation:: ACS Photonics, 2018, 5 (10), pp. 3950 - 3955
Issue Date:: 2018-10-17

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Field	Value	Language
dc.contributor.author	Duong, NMH	en_US
dc.contributor.author	Xu, ZQ https://orcid.org/0000-0001-7291-1426	en_US
dc.contributor.author	Kianinia, M	en_US
dc.contributor.author	Su, R	en_US
dc.contributor.author	Liu, Z	en_US
dc.contributor.author	Kim, S https://orcid.org/0000-0001-9836-3608	en_US
dc.contributor.author	Bradac, C https://orcid.org/0000-0002-6673-7238	en_US
dc.contributor.author	Tran, TT https://orcid.org/0000-0001-8960-0253	en_US
dc.contributor.author	Wan, Y	en_US
dc.contributor.author	Li, LJ	en_US
dc.contributor.author	Solntsev, A https://orcid.org/0000-0003-4981-9730	en_US
dc.contributor.author	Liu, J	en_US
dc.contributor.author	Aharonovich, I https://orcid.org/0000-0003-4304-3935	en_US
dc.date.available	2020-05-25T19:11:53Z
dc.date.issued	2018-10-17	en_US
dc.identifier.citation	ACS Photonics, 2018, 5 (10), pp. 3950 - 3955	en_US
dc.identifier.uri	http://hdl.handle.net/10453/134355
dc.description.abstract	© Copyright 2018 American Chemical Society. Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe2) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe2 and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DE180100070
dc.relation	http://purl.org/au-research/grants/arc/DP180100077
dc.relation	http://purl.org/au-research/grants/arc/DE180100810
dc.relation.ispartof	ACS Photonics	en_US
dc.relation.isbasedon	10.1021/acsphotonics.8b00865	en_US
dc.title	Enhanced Emission from WSe<inf>2</inf> Monolayers Coupled to Circular Bragg Gratings	en_US
dc.type	Journal Article
utslib.citation.volume	10	en_US
utslib.citation.volume	5	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0206 Quantum Physics	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	open_access
pubs.issue	10	en_US
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

© Copyright 2018 American Chemical Society. Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize coupling of tungsten diselenide (WSe2) monolayers to circular Bragg grating structures to achieve enhanced emission. The interaction between WSe2 and the resonant mode of the structure results in Purcell-enhanced emission, and the symmetric geometrical structure improves the directionality of the out-coupling stream of emitted photons. Furthermore, this hybrid structure produces a record high contrast of the spin valley readout (>40%) revealed by the polarization-resolved photoluminescence (PL) measurements. Our results are promising for on-chip integration of TMDC monolayers with optical resonators for nanophotonic circuits.

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http://hdl.handle.net/10453/134355