Quantum dot micropillar cavities with SiO2 hard mask microlenses

Jordan, Matthew, Androvitsaneas, Petros ORCID: https://orcid.org/0000-0001-5013-0282, Clark, Rachel N., Trapalis, Aristotelis, Farrer, Ian A., Langbein, Wolfgang ORCID: https://orcid.org/0000-0001-9786-1023, Bennett, Anthony J. ORCID: https://orcid.org/0000-0002-5386-3710, Adibi, Ali, Lin, Shawn-Yu and Scherer, Axel 2024. Quantum dot micropillar cavities with SiO2 hard mask microlenses. Presented at: SPIE OPTO, 2024, 27 January - 01 February 2024. Proceedings SPIE 12896, Photonic and Phononic Properties of Engineered Nanostructures XIV. SPIE, 10.1117/12.3005342

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Abstract

We report finite difference time domain simulations of GaAs-Al0.95Ga0.05As micropillars containing single quantum dots with SiO2 microlenses of differing shapes and heights, finding an approximately linear reduction in the numerical aperture and mode field diameter of the outcoupled emissions via the fundamental mode. This opens the possibility of modifying our previously reported direct-write lithography process to leave an amount of hard mask on top of the pillar, which could modify the light emitted from our single photon sources to be more efficiently coupled into an output single mode fibre.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering Physics and Astronomy
Publisher:	SPIE
Last Modified:	10 Apr 2024 16:15
URI:	https://orca.cardiff.ac.uk/id/eprint/167806

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