24 February 2017 Bulk diamond optical waveguides fabricated by focused femtosecond laser pulses
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Proceedings Volume 10095, Laser 3D Manufacturing IV; 100950Q (2017) https://doi.org/10.1117/12.2258062
Event: SPIE LASE, 2017, San Francisco, California, United States
Abstract
Diamond’s nitrogen-vacancy (NV) centers show great promise in sensing applications and quantum computing due to their long electron spin coherence time and their ability to be located, manipulated and read out using light. 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, even at room temperature. The NV's states are isolated from environmental perturbations making their spin coherence comparable to trapped ions. An important breakthrough would be in connecting, using waveguides, multiple diamond NVs together optically. However, the inertness of diamond is a significant hurdle for the fabrication of integrated optics similar to those that revolutionized silicon photonics. In this work we show the possibility of buried waveguide fabrication in diamond, enabled by focused femtosecond high repetition rate laser pulses. We use μRaman spectroscopy to gain better insight into the structure and refractive index profile of the optical waveguides.
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J.P. Hadden, J.P. Hadden, Belén Sotillo, Belén Sotillo, Vibhav Bharadwaj, Vibhav Bharadwaj, Stefano Rampini, Stefano Rampini, Federico Bosia, Federico Bosia, Federico Picollo, Federico Picollo, Masaaki Sakakura, Masaaki Sakakura, Andrea Chiappini, Andrea Chiappini, Toney T. Fernandez, Toney T. Fernandez, Roberto Osellame, Roberto Osellame, Kiyotaka Miura, Kiyotaka Miura, Maurizio Ferrari, Maurizio Ferrari, Roberta Ramponi, Roberta Ramponi, Paolo Olivero, Paolo Olivero, Paul E. Barclay, Paul E. Barclay, Shane M. Eaton, Shane M. Eaton, } "Bulk diamond optical waveguides fabricated by focused femtosecond laser pulses", Proc. SPIE 10095, Laser 3D Manufacturing IV, 100950Q (24 February 2017); doi: 10.1117/12.2258062; https://doi.org/10.1117/12.2258062
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