Femtosecond laser processing for single NV-waveguide integration in diamond

Sotillo, Belen, Bharadwaj, Vibhav, Hadden, John Patrick ORCID: https://orcid.org/0000-0001-5407-6754, Rampini, Stefano, Chiappini, Andrea, Armellini, Cristina, Criante, Luigino, Fernandez, Toney T., Osellame, Roberto, Ferrari, Maurizio, Ramponi, Roberta, Barclay, Paul E. and Eaton, Shane M. 2017. Femtosecond laser processing for single NV-waveguide integration in diamond. Presented at: 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 25-29 June 2017. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC. IEEE, 10.1109/CLEOE-EQEC.2017.8087836

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Abstract

Summary form only given. Diamond is an exceptional material due to its hardness, high thermal conductivity and transparency from the UV to far IR. Recently it has caught the attention of the scientific community because it is the host of different color centers that can be used for magnetic sensing applications and quantum computing [1]. One of the most promising of these defects is the nitrogen-vacancy (NV) center. The electrons of the NV center, largely localized at the vacancy site, combine to form a spin triplet, which can be polarized with 532-nm laser light. The NV's states are isolated from environmental perturbations, making their spin coherence times long even at room temperature. The NVs can be easily initialized, manipulated and read out using light. Therefore, an important breakthrough would be in connecting, using optical waveguides, multiple diamond NVs. In this work we propose the use of high repetition rate femtosecond laser writing to fabricate buried optical waveguides in diamond. Understanding the effect of the femtosecond laser pulses on the diamond crystal lattice is critical to improve the optical waveguide performance and to obtain NVs with properties as good as in the pristine material. Employing μRaman spectroscopy, optically detected magnetic resonance and confocal μPhotoluminescence (μPL) characterization, we showed that in optical grade diamond, the properties of NV centers already present within the laser-written optical waveguides were preserved [3].

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	IEEE
ISBN:	978-1-5090-6736-7
Last Modified:	24 Oct 2022 07:06
URI:	https://orca.cardiff.ac.uk/id/eprint/114111

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