title: Decoherence imaging of spin ensembles using a scanning single-electron spin in diamond.
abstract: 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 800 μB 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.
authors: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors: Lan
authors: L
authors: Luan
authors: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors: Michael S
authors: MS
authors: Grinolds
authors: 1] Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA [2] Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, University of Vienna, A-1090 Vienna, Austria.
authors: Sungkun
authors: S
authors: Hong
authors: Department of Physics, University of Basel, Klingelbergstrasse 82, Basel CH-4056, Switzerland.
authors: Patrick
authors: P
authors: Maletinsky
authors: Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
authors: Ronald L
authors: RL
authors: Walsworth
authors: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors: Amir
authors: A
authors: Yacoby
references: Nat Nanotechnol. 2014 Apr;9(4):279-84
references: 24658168
references: Science. 2006 Oct 13;314(5797):281-5
references: 16973839
references: Nat Nanotechnol. 2012 May;7(5):320-4
references: 22504708
references: Nat Nanotechnol. 2012 Oct;7(10):657-62
references: 22941402
references: Science. 2013 Feb 1;339(6119):557-60
references: 23372008
references: Phys Rev Lett. 2012 Sep 28;109(13):137601
references: 23030118
references: Nature. 2008 Oct 2;455(7213):648-51
references: 18833276
references: Phys Rev Lett. 2014 Apr 11;112(14):147602
references: 24766015
references: Phys Rev Lett. 2012 Sep 28;109(13):137602
references: 23030119
references: Science. 2010 Oct 1;330(6000):60-3
references: 20829452
references: Nature. 2013 Apr 25;496(7446):486-9
references: 23619694
references: Nature. 2008 Oct 2;455(7213):644-7
references: 18833275
references: Nat Nanotechnol. 2011 Apr;6(4):242-6
references: 21358646
references: Rep Prog Phys. 2014 May;77(5):056503
references: 24801494
references: Science. 2013 Feb 1;339(6119):561-3
references: 23372009
references: Nat Commun. 2012 May 22;3:858
references: 22617298
references: Phys Rev Lett. 2012 Feb 24;108(8):086802
references: 22463554
references: Nat Mater. 2009 May;8(5):383-7
references: 19349970
references: Phys Rev Lett. 2009 Nov 27;103(22):220802
references: 20366085
references: Nanotechnology. 2009 Dec 9;20(49):495401
references: 19904024
references: Proc Natl Acad Sci U S A. 2010 Nov 2;107(44):18777-82
references: 20937908