Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 13: Precision Measurements and Metrology: Optical Clocks
Q 13.8: Vortrag
Montag, 6. März 2017, 18:45–19:00, P 104
High precision and high frequency sensing with a continuous drive utilizing the Nitrogen Vacancy center — •Daniel Louzon1,2, Alexander Stark1,3, Thomas Undnen1, Nati Aharon2, Alexander Huck3, Ulrik L. Andersen3, Alex Retzker2, and Fedor Jelzko1 — 1Ulm University, Ulm, Germany — 2Hebrew University, Jerusalem — 3Technical University of Denmark, Kongens Lyngby, Denmark
Single defect centers in diamond and especially the nitrogen-vacancy (NV) show remarkable physical properties such as long spin coherence time and the emission of single photons. These properties make them ideal candidates for qubits and nano-scale magnetic field sensors [1].
High frequency sensing, using a two level system, is considered T2* limited, given dynamical decoupling techniques cannot be applied on a time scale shorter than the on-resonance signal being measured.
We present the implementation of a novel technique to measure a weak high frequency signal using a detuned two level system and a series of continuous driving fields prolonging the coherence time of the two level system in principle close to its T1 time [2].
The technique is demonstrated on a single NV center in diamond as the two level system, measuring a weak high frequency signal, with a coherence time over an order of magnitude longer than its T2*.
[1] M. Doherty et al., Physics Reports 528, 1 (2013) [2] N. Aharon et al., arXiv: 1609.07812 (2016).