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Optical fabrication and characterisation of SU-8 disk photonic waveguide heterostructure cavities

Nuttall, LP; Brossard, FSF; Lennon, SA; Reid, BPL; Wu, J; Griffiths, J; Taylor, RA; (2017) Optical fabrication and characterisation of SU-8 disk photonic waveguide heterostructure cavities. Optics Express , 25 (20) pp. 24615-24622. 10.1364/OE.25.024615. Green open access

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Abstract

In order to demonstrate cavity quantum electrodynamics using photonic crystal (PhC) cavities fabricated around self-assembled quantum dots (QDs), reliable spectral and spatial overlap between the cavity mode and the quantum dot is required. We present a method for using photoresist to optically fabricate heterostructure cavities in a PhC waveguide with a combined photolithography and micro-photoluminescence spectroscopy system. The system can identify single QDs with a spatial precision of ±25 nm, and we confirm the creation of high quality factor cavity modes deterministically placed with the same spatial precision. This method offers a promising route towards bright, on-chip single photon sources for quantum information applications.

Type: Article
Title: Optical fabrication and characterisation of SU-8 disk photonic waveguide heterostructure cavities
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OE.25.024615
Publisher version: https://doi.org/10.1364/OE.25.024615
Language: English
Additional information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10026139
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