Femtosecond laser-written nanoablations containing bright antibunched emitters on gallium nitride

Guo, Yanzhao, Coccia, Giulio, Bharadwaj, Vibhav, Yoshizaki, Reina, Eggleton, Katie M., Hadden, John P. ORCID: https://orcid.org/0000-0001-5407-6754, Eaton, Shane M. and Bennett, Anthony J. ORCID: https://orcid.org/0000-0002-5386-3710 2025. Femtosecond laser-written nanoablations containing bright antibunched emitters on gallium nitride. ACS Photonics 12 (10) , 5716–5722. 10.1021/acsphotonics.5c01506

PDF - Published Version Available under License Creative Commons Attribution. Download (7MB)

Abstract

Femtosecond laser-writing offers distinct capabilities for fabrication, including three-dimensional, multimaterial, and sub-diffraction-limited patterning. In particular, demonstrations of laser-written quantum emitters and photonic devices with superior optical properties have attracted attention. Recently, gallium nitride (GaN) has been reported to host quantum emitters with narrow and bright zero-phonon photoluminescence from ultraviolet to telecom ranges. However, emitters formed during epitaxy are randomly positioned, and until now, it has not been possible to fabricate quantum emitters in ordered arrays. In this paper, we employ femtosecond laser writing to create nanoablations with sub-diffraction-limited diameter and use rapid thermal annealing to activate co-located stable emitters. The emitters show a MHz antibunched emission with a sharp spectral peak at room temperature. Our study not only presents an efficient approach to laser-written nanofabrication on GaN but also offers a promising pathway for the deterministic creation of quantum emitters in GaN, shedding light on the underlying mechanisms involved.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Start Date: 2025-10-02
Publisher:	American Chemical Society
ISSN:	2330-4022
Date of First Compliant Deposit:	16 October 2025
Date of Acceptance:	24 September 2025
Last Modified:	16 Oct 2025 10:30
URI:	https://orca.cardiff.ac.uk/id/eprint/181710

Actions (repository staff only)

Edit Item