Super-poissonian light statistics from individual silicon vacancy centers coupled to a laser-written diamond waveguide

Koch, Michael K., Hoese, Michael, Bharadwaj, Vibhav, Lang, Johannes, Hadden, John P. ORCID: https://orcid.org/0000-0001-5407-6754, Ramponi, Roberta, Jelezko, Fedor, Eaton, Shane M. and Kubanek, Alexander 2022. Super-poissonian light statistics from individual silicon vacancy centers coupled to a laser-written diamond waveguide. ACS Photonics 9 (10) , pp. 3366-3373. 10.1021/acsphotonics.2c00774

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Abstract

Modifying light fields at the single-photon level is a key challenge for upcoming quantum technologies and can be realized in a scalable manner through integrated quantum photonics. Laser-written diamond photonics offers 3D fabrication capabilities and large mode-field diameters matched to fiber optic technology, though limiting the cooperativity at the single-emitter level. To realize large coupling efficiencies, we combine excitation of single shallow-implanted silicon vacancy centers via high numerical aperture optics with detection assisted by laser-written type-II waveguides. We demonstrate single-emitter extinction measurements with a cooperativity of 0.0050 and a relative beta factor of 13%. The transmission of resonant photons reveals single-photon subtraction from a quasi-coherent field resulting in super-Poissonian light statistics. Our architecture enables light field engineering in an integrated design on the single quantum level although the intrinsic cooperativity is low. Laser-written structures can be fabricated in three dimensions and with a natural connectivity to optical fiber arrays.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	American Chemical Society
ISSN:	2330-4022
Funders:	European Commission H2020 Marie Curie ITN project LasIonDef
Date of First Compliant Deposit:	26 October 2022
Date of Acceptance:	14 September 2022
Last Modified:	15 May 2023 18:35
URI:	https://orca.cardiff.ac.uk/id/eprint/153583

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