Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.69: Poster
Thursday, March 9, 2017, 17:00–19:00, P OG2
Temperature dependent measurements of spin relaxation times of NV centers in nanodiamonds — •Lukas Antoniuk1, Andreas Dietrich1, Stefan Häußler1, Kobinian Kottmann1, Ilai Schwarz2, Christoph Müller1, Fedor Jelezko1, and Alexander Kubanek1 — 1Institute for Quantum Optics, Ulm University, D-89081 Ulm, Germany — 2Institute for Theoretical Physics, Ulm University, D-89081 Ulm, Germany
Nitrogen-vacancy (NV) color centers in nanodiamonds (<100nm) are promising candidates for nanoscale sensing and for hyperpolarization techniques, which are based on the transfer of the NV center's electron spin polarization to surrounding nuclear spins. However, both applications are limited by the spin relaxation time of the NV centre spin, which is relatively short compared to NV centers in bulk diamond. The spin relaxation time is dominated by interactions with a bath of paramagnetic impurities on the diamond surface [1]. Here we present spin relaxation time measurements in nanodiamonds of different sizes over a broad range of cryogenic temperatures, which allow to gain a better understanding on the ongoing interactions. The nanodiamond size and therefore the distance from NV centres to the surface thereby determines the interaction strength and temperatures changes are influencing the dynamics in the surrounding bath.
[1] J.-P. Tetienne, et al. Phys.Rev. B. 87, 235436 (2013)