SAMOP 2021 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 16: Quantum Optics

Q 16.9: Poster

Thursday, September 23, 2021, 16:30–18:30, P

Microwave Driving of Dipole-Forbidden Transitions in the Electronic Ground State of the NV Center — •Florian Böhm¹, Niko Nikolay¹, Sascha Neinert¹, Christoph Nebel², and Oliver Benson¹ — ¹Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, Germany — ²Nanomaterials Research Institute, Kanazawa University, Japan

The nitrogen-vacancy (NV) center in diamond is one of the most widely studied solid-state spin systems, as it can be used in a wide variety of quantum applications [1]. It features an electronic qutrit ground state with long coherence times, which can be coherently controlled at room temperature by microwave pulses. The broad range of possible applications the NV center offers stimulates a great interest in developing new control schemes or adapting control schemes to the NV center.

For this reason, we investigate the application of two-photon microwave pulses to a single NV center, in order to directly drive the spin-forbidden transition between the m_S = −1 ↔ m_S = +1 sublevels. More precisely, we show the experimental implementation of two different two-photon schemes, stimulated Raman transitions (SRT) and stimulated Raman adiabatic passage (STIRAP) [2]. We show, that both schemes can successfully drive the dipole-forbidden transition and compare the experimental results to numerical simulations. Furthermore, we compare both schemes on their robustness and success of the spin-swap, as well as their experimental challenges.

[1] Doherty, Marcus W., et al., Physics Reports 528.1 (2013): 1-45

[2] Böhm, Florian, et al., Phys. Rev. B, 104.3 (2021): 035201