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Photonic crystals for enhanced light extraction from 2D materials

Photonic crystals for enhanced light extraction from 2D materials
Photonic crystals for enhanced light extraction from 2D materials

In recent years, a range of two-dimensional transition metal dichalcogenides (TMDs) have been studied, and remarkable optical and electronic characteristics have been demonstrated. Furthermore, the weak interlayer van der Waals interaction allows TMDs to adapt to a range of substrates. Unfortunately, the photons emitted from these TMD monolayers are difficult to efficiently collect into simple optics, reducing the practicality of these materials. The realization of on-chip optical devices for quantum information applications requires structures that maximize optical extraction efficiency while also minimizing substrate loss. In this work we propose a photonic crystal cavity based on silicon rods that allows maximal spatial and spectral coupling between TMD monolayers and the cavity mode. Finite difference time domain simulations revealed that TMDs coupled to this type of cavity have highly directional emission toward the collection optics, as well as up to 400% enhancement in luminescence intensity, compared to monolayers on flat substrates. We consider realistic fabrication tolerances and discuss the extent of the achievable spatial alignment with the cavity mode field maxima.

extraction efficiency, finite difference time domain, molybdenum disulfide, photonic crystals, transition metal dichalcogenides
2330-4022
2515-2520
Noori, Yasir J.
704d0b70-1ea6-4e00-92ce-cc2543087a09
Cao, Yameng
ace999c1-8c45-4b7e-bcef-e99aebef69ab
Roberts, Jonathan
f6dc4282-689f-49f2-8b1b-3c71cf74db6b
Woodhead, Christopher
7a034c66-eefb-4d2a-b6a1-e8e7402076fe
Bernardo-Gavito, Ramon
5a3045fa-eb68-4e54-a200-6231ee130b13
Tovee, Peter
700a75c5-6aad-4937-985e-09fae0ad495e
Young, Robert J.
333e90a3-3175-44a6-82ab-f543e6e293db
Noori, Yasir J.
704d0b70-1ea6-4e00-92ce-cc2543087a09
Cao, Yameng
ace999c1-8c45-4b7e-bcef-e99aebef69ab
Roberts, Jonathan
f6dc4282-689f-49f2-8b1b-3c71cf74db6b
Woodhead, Christopher
7a034c66-eefb-4d2a-b6a1-e8e7402076fe
Bernardo-Gavito, Ramon
5a3045fa-eb68-4e54-a200-6231ee130b13
Tovee, Peter
700a75c5-6aad-4937-985e-09fae0ad495e
Young, Robert J.
333e90a3-3175-44a6-82ab-f543e6e293db

Noori, Yasir J., Cao, Yameng, Roberts, Jonathan, Woodhead, Christopher, Bernardo-Gavito, Ramon, Tovee, Peter and Young, Robert J. (2016) Photonic crystals for enhanced light extraction from 2D materials. ACS Photonics, 3 (12), 2515-2520. (doi:10.1021/acsphotonics.6b00779).

Record type: Article

Abstract

In recent years, a range of two-dimensional transition metal dichalcogenides (TMDs) have been studied, and remarkable optical and electronic characteristics have been demonstrated. Furthermore, the weak interlayer van der Waals interaction allows TMDs to adapt to a range of substrates. Unfortunately, the photons emitted from these TMD monolayers are difficult to efficiently collect into simple optics, reducing the practicality of these materials. The realization of on-chip optical devices for quantum information applications requires structures that maximize optical extraction efficiency while also minimizing substrate loss. In this work we propose a photonic crystal cavity based on silicon rods that allows maximal spatial and spectral coupling between TMD monolayers and the cavity mode. Finite difference time domain simulations revealed that TMDs coupled to this type of cavity have highly directional emission toward the collection optics, as well as up to 400% enhancement in luminescence intensity, compared to monolayers on flat substrates. We consider realistic fabrication tolerances and discuss the extent of the achievable spatial alignment with the cavity mode field maxima.

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e-pub ahead of print date: 23 November 2016
Published date: 21 December 2016
Keywords: extraction efficiency, finite difference time domain, molybdenum disulfide, photonic crystals, transition metal dichalcogenides

Identifiers

Local EPrints ID: 425672
URI: https://eprints.soton.ac.uk/id/eprint/425672
ISSN: 2330-4022
PURE UUID: 4d8bcac4-c5b9-4cdb-894c-afdc30e89e7a
ORCID for Yasir J. Noori: ORCID iD orcid.org/0000-0001-5285-8779

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Date deposited: 31 Oct 2018 17:30
Last modified: 10 Dec 2019 01:23

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Contributors

Author: Yasir J. Noori ORCID iD
Author: Yameng Cao
Author: Jonathan Roberts
Author: Christopher Woodhead
Author: Ramon Bernardo-Gavito
Author: Peter Tovee
Author: Robert J. Young

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