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Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses

Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses
Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses

The recent discovery of semiconducting two-dimensional materials is predicted to lead to the introduction of a series of revolutionary optoelectronic components that are just a few atoms thick. Key remaining challenges for producing practical devices from these materials lie in improving the coupling of light into and out of single atomic layers, and in making these layers robust to the influence of their surrounding environment. We present a solution to tackle both of these problems simultaneously, by deterministically placing an epoxy based micro-lens directly onto the materials'surface. We show that this approach enhances the photoluminescence of tungsten diselenide (WSe2) monolayers by up to 300%, and nearly doubles the imaging resolution of the system. Furthermore, this solution fully encapsulates the monolayer, preventing it from physical damage and degradation in air. The optical solution we have developed could become a key enabling technology for the mass production of ultra-thin optical devices, such as quantum light emitting diodes.

Extraction efficiency, Monolayer, Photoluminescence, Solid immersion lens, Tungsten diselenide
2053-1583
1-8
Woodhead, C.S.
7a034c66-eefb-4d2a-b6a1-e8e7402076fe
Roberts, J.
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Noori, Y.J.
704d0b70-1ea6-4e00-92ce-cc2543087a09
Cao, Y.
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Bernardo-Gavito, R.
cf45cbf2-f5e7-47f9-bb3e-30cbf5005b10
Tovee, P.
dc340c8c-6386-451a-9807-2c65890ca195
Kozikov, A.
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Novoselov, K.
f825a2ba-107b-4c89-83f7-04ea65e9f8d2
Young, R.J.
333e90a3-3175-44a6-82ab-f543e6e293db
Woodhead, C.S.
7a034c66-eefb-4d2a-b6a1-e8e7402076fe
Roberts, J.
c0f02e65-52f0-4432-9e47-e28fc62f53e1
Noori, Y.J.
704d0b70-1ea6-4e00-92ce-cc2543087a09
Cao, Y.
4eb7ca6a-a4f3-4fb7-898b-8794d727cb67
Bernardo-Gavito, R.
cf45cbf2-f5e7-47f9-bb3e-30cbf5005b10
Tovee, P.
dc340c8c-6386-451a-9807-2c65890ca195
Kozikov, A.
d6c4b72c-0a4d-47c3-b333-91561cbbef04
Novoselov, K.
f825a2ba-107b-4c89-83f7-04ea65e9f8d2
Young, R.J.
333e90a3-3175-44a6-82ab-f543e6e293db

Woodhead, C.S., Roberts, J., Noori, Y.J., Cao, Y., Bernardo-Gavito, R., Tovee, P., Kozikov, A., Novoselov, K. and Young, R.J. (2017) Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses. 2D Materials, 4 (1), 1-8, [015032]. (doi:10.1088/2053-1583/4/1/015032).

Record type: Article

Abstract

The recent discovery of semiconducting two-dimensional materials is predicted to lead to the introduction of a series of revolutionary optoelectronic components that are just a few atoms thick. Key remaining challenges for producing practical devices from these materials lie in improving the coupling of light into and out of single atomic layers, and in making these layers robust to the influence of their surrounding environment. We present a solution to tackle both of these problems simultaneously, by deterministically placing an epoxy based micro-lens directly onto the materials'surface. We show that this approach enhances the photoluminescence of tungsten diselenide (WSe2) monolayers by up to 300%, and nearly doubles the imaging resolution of the system. Furthermore, this solution fully encapsulates the monolayer, preventing it from physical damage and degradation in air. The optical solution we have developed could become a key enabling technology for the mass production of ultra-thin optical devices, such as quantum light emitting diodes.

Text
Woodhead 2017 2D Mater. 4 015032 - Version of Record
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More information

Accepted/In Press date: 11 November 2016
e-pub ahead of print date: 7 December 2016
Published date: 1 March 2017
Keywords: Extraction efficiency, Monolayer, Photoluminescence, Solid immersion lens, Tungsten diselenide

Identifiers

Local EPrints ID: 425674
URI: http://eprints.soton.ac.uk/id/eprint/425674
ISSN: 2053-1583
PURE UUID: c8e81121-24bd-4622-8f4c-0832a159e3a4
ORCID for Y.J. Noori: ORCID iD orcid.org/0000-0001-5285-8779

Catalogue record

Date deposited: 31 Oct 2018 17:30
Last modified: 07 Oct 2020 02:21

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Contributors

Author: C.S. Woodhead
Author: J. Roberts
Author: Y.J. Noori ORCID iD
Author: Y. Cao
Author: R. Bernardo-Gavito
Author: P. Tovee
Author: A. Kozikov
Author: K. Novoselov
Author: R.J. Young

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