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Laser written nitrogen vacancy centers in diamond integrated with transfer print GaN solid immersion lenses

MetadataDetails
Publication Date2024-03-12
AuthorsXingrui Cheng, Nils Kolja Wessling, Saptarsi Ghosh, Andrew Kirkpatrick, Menno J. Kappers
InstitutionsUniversity of Oxford, University of Strathclyde

Laser-written Nitrogen Vacancy (NVāˆ’) centers are combined with transfer-printed GaN micro-lenses to increase fluorescent light collection by reducing total internal reflection at the planar diamond interface. We find a 2x improvement of fluorescent light collection using a 0.95 NA air objective at room temperature, in agreement with FDTD simulations. The nature of the transfer print micro-lenses leads to better performance with lower Numerical Aperture (NA) collection, as confirmed by results with a 0.5NA air objective which show improvement greater than 5x. The approach is attractive for scalable integrated quantum technologies.

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