Decoherence imaging of spin ensembles using a scanning single-electron spin in diamond

Autor(en)

Lan Luan, Michael S. Grinolds, Sungkun Hong, Patrick Maletinsky, Ronald L. Walsworth, Amir Yacoby

Abstrakt

The nitrogen-vacancy (NV) defect center in diamond has demonstrated great capability for nanoscale magnetic sensing and imaging for both static and periodically modulated target fields. However, it remains a challenge to detect and image randomly fluctuating magnetic fields. Recent theoretical and numerical works have outlined detection schemes that exploit changes in decoherence of the detector spin as a sensitive measure for fluctuating fields. Here we experimentally monitor the decoherence of a scanning NV center in order to image the fluctuating magnetic fields from paramagnetic impurities on an underlying diamond surface. We detect a signal corresponding to roughly 800μ

_B in 2 s of integration time, without any control on the target spins, and obtain magnetic-field spectral information using dynamical decoupling techniques. The extracted spatial and temporal properties of the surface paramagnetic impurities provide insight to prolonging the coherence of near-surface qubits for quantum information and metrology applications.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Harvard University, Universität Basel, Harvard-Smithsonian Center for Astrophysics

Journal

Scientific Reports

Band

5

Anzahl der Seiten

5

ISSN

2045-2322

DOI

https://doi.org/10.1038/srep08119

Publikationsdatum

01-2015

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik, 103004 Astrophysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/830c1483-c23b-4bd7-b2ef-c851bcf1f4a8