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Quantum technologies in diamond enabled by laser processing

Giakoumaki, A. N., Coccia, G., Bharadwaj, V., Hadden, J. P. ORCID:, Bennett, A. J. ORCID:, Sotillo, B., Yoshizaki, R., Olivero, P., Jedrkiewicz, O., Ramponi, R., Pietralunga, S. M., Bollani, M., Bifone, A., Barclay, P. E., Kubanek, A. and Eaton, S. M. 2022. Quantum technologies in diamond enabled by laser processing. Applied Physics Letters 120 (2) , 020502. 10.1063/5.0080348

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Integrated photonic circuits promise to be foundational for applications in quantum information and sensing technologies, through their ability to confine and manipulate light. A key role in such technologies may be played by spin-active quantum emitters, which can be used to store quantum information or as sensitive probes of the local environment. A leading candidate is the negatively charged nitrogen vacancy (NV−) diamond color center, whose ground spin state can be optically read out, exhibiting long (≈1 ms) coherence times at room temperature. These properties have driven research toward the integration of photonic circuits in the bulk of diamond with the development of techniques allowing fabrication of optical waveguides. In particular, femtosecond laser writing has emerged as a powerful technique, capable of writing light guiding structures with 3D configurations as well as creating NV complexes. In this Perspective, the physical mechanisms behind laser fabrication in diamond will be reviewed. The properties of waveguides, single- and ensemble-NV centers, will be analyzed, together with the possibility to combine such structures in integrated photonic devices, which can find direct application in quantum information and sensing.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Engineering
Physics and Astronomy
Additional Information: All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (
Publisher: American Institute of Physics
ISSN: 0003-6951
Funders: European Commission H2020 Marie Curie ITN project LasIonDef
Date of First Compliant Deposit: 10 January 2022
Date of Acceptance: 29 December 2021
Last Modified: 29 Nov 2022 10:29

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