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  • YJN - Photonic crystals for enhanced light extraction from 2D materials

    Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © 2016 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsphotonics.6b00779

    Accepted author manuscript, 6 MB, PDF-document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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    Final published version, 2 MB, PDF-document

    Available under license: CC BY

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Photonic crystals for enhanced light extraction from 2D materials

Research output: Contribution to journalJournal article

Published
<mark>Journal publication date</mark>12/2016
<mark>Journal</mark>ACS Photonics
Issue number12
Volume3
Number of pages6
Pages (from-to)2515-2520
Publication statusPublished
Early online date14/11/16
Original languageEnglish

Abstract

In recent years, a range of two-dimensional (2D) 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 efficiently whilst 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 (FDTD) simulations revealed that TMDs coupled to this type of cavity have highly directional emission towards 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.

Bibliographic note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © 2016 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsphotonics.6b00779