Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 29: Quantum Optics and Photonics I
Q 29.8: Vortrag
Dienstag, 6. März 2018, 15:45–16:00, K 0.016
NV assisted spectroscopy and control of the local paramagnetic spin bath in 15N delta-doped diamond — •Florian Böhm1, Nikola Sadzak1, Claudia Widmann2, Christoph Nebel2, and Oliver Benson1 — 1AG Nanooptik, Humbodt-Universität zu Berlin, Germany — 2Fraunhofer-Institut für Angewandte Festkörperphysik, Freiburg
The Nitrogen-vacancy (NV) center is amongst the most prominent defects in diamond, i.a. due to it's manipulable electron spin. However, the diamond matrix can also host other 'dark' paramagnetic impurities operating as a local spin bath interacting with the NV centers electron spin, leading to its decoherence [1].
In this work we use single shallow NV centers to investigate the nature and behaviour of the local bath environment in a 15N delta-doped [111] diamond using electron spin resonance (ESR) spectroscopy and probe its dynamics using double spin resonance [2]. By actively controlling the spin bath we can i.a. suppress the dephasing of the NV centers spin and measure the coupling strength between the NV sensor and different Nitrogen symmetry groups.
Our research aims at extending the coherence time of NV centers generated in diamond via implantation or delta-doping of 15N in order to enhance their magnetic field sensitivity.
[1] De Lange, G., et al. (2012). Sci. rep., 2, 382.
[2] Grotz, B., et al. (2011). New Jnl. of Phys., 13(5), 055004.