Determining strain components in a diamond waveguide from zero-field optically detected magnetic resonance spectra of negatively charged nitrogen-vacancy-center ensembles

Alam, M. Sahnawaz, Gorrini, Federico, Gawelczyk, Michal, Wigger, Daniel, Coccia, Giulio, Guo, Yanzhao, Shahbazi, Sajedeh, Bharadwaj, Vibhav, Kubanek, Alexander, Ramponi, Roberta, Barclay, Paul E., Bennett, Anthony J. ORCID: https://orcid.org/0000-0002-5386-3710, Hadden, John P. ORCID: https://orcid.org/0000-0001-5407-6754, Bifone, Angelo, Eaton, Shane M. and Machnikowski, Paweł 2024. Determining strain components in a diamond waveguide from zero-field optically detected magnetic resonance spectra of negatively charged nitrogen-vacancy-center ensembles. Physical Review Applied 22 (2) , 024055. 10.1103/PhysRevApplied.22.024055

Preview

PDF - Accepted Post-Print Version Download (1MB) | Preview

Abstract

The negatively charged nitrogen-vacancy (N-v−) center in diamond has shown great potential in nanoscale sensing and quantum information processing due to its rich spin physics. An efficient coupling with light, providing strong luminescence, is crucial for realizing these applications. Laser-written waveguides in diamond promote N-v− creation and improve their coupling to light but, at the same time, induce strain in the crystal. The induced strain contributes to light guiding but also affects the energy levels of N-v− centers. We probe N-v− spin states experimentally with the commonly used continuous-wave zero-field optically detected magnetic resonance (ODMR). In our waveguides, the ODMR spectra are shifted, split, and consistently asymmetric, which we attribute to the impact of local strain. To understand these features, we model ensemble ODMR signals in the presence of strain. By fitting the model results to the experimentally collected ODMR data, we determine the strain tensor components at different positions, thus determining the strain profile across the waveguide. This shows that zero-field ODMR spectroscopy can be used as a strain imaging tool. The resulting strain within the waveguide is dominated by a compressive axial component transverse to the waveguide structure, with a smaller contribution from vertical and shear strain components.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	American Physical Society
ISSN:	2331-7019
Date of First Compliant Deposit:	29 October 2024
Date of Acceptance:	25 August 2024
Last Modified:	08 Jan 2025 22:30
URI:	https://orca.cardiff.ac.uk/id/eprint/172578

Actions (repository staff only)

Edit Item