TY - JOUR
T1 - Enhanced concentrations of nitrogen-vacancy centers in diamond through TEM irradiation
AU - Farfurnik, D.
AU - Alfasi, N.
AU - Masis, S.
AU - Kauffmann, Y.
AU - Farchi, E.
AU - Romach, Y.
AU - Hovav, Y.
AU - Buks, E.
AU - Bar-Gill, N.
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/9/18
Y1 - 2017/9/18
N2 - The studies of many-body dynamics of interacting spin ensembles, as well as quantum sensing in solid state systems, are often limited by the need for high spin concentrations, along with efficient decoupling of the spin ensemble from its environment. In particular, for an ensemble of nitrogen-vacancy (NV) centers in diamond, high conversion efficiencies between nitrogen (P1) defects and NV centers are essential while maintaining long coherence times of an NV ensemble. In this work, we study the effect of electron irradiation on the conversion efficiency and the coherence time of various types of diamond samples with different initial nitrogen concentrations. The samples were irradiated using a 200 keV transmission electron microscope. Our study reveals that the efficiency of NV creation strongly depends on the initial conversion efficiency and on the initial nitrogen concentration. The irradiation of the examined samples exhibits an order of magnitude improvement in the NV concentration (up to ∼1011 NV/cm2), without degradation in their coherence time of ∼180 μs. We address the potential of this technique toward the study of many-body physics of NV ensembles and the creation of non-classical spin states for quantum sensing.
AB - The studies of many-body dynamics of interacting spin ensembles, as well as quantum sensing in solid state systems, are often limited by the need for high spin concentrations, along with efficient decoupling of the spin ensemble from its environment. In particular, for an ensemble of nitrogen-vacancy (NV) centers in diamond, high conversion efficiencies between nitrogen (P1) defects and NV centers are essential while maintaining long coherence times of an NV ensemble. In this work, we study the effect of electron irradiation on the conversion efficiency and the coherence time of various types of diamond samples with different initial nitrogen concentrations. The samples were irradiated using a 200 keV transmission electron microscope. Our study reveals that the efficiency of NV creation strongly depends on the initial conversion efficiency and on the initial nitrogen concentration. The irradiation of the examined samples exhibits an order of magnitude improvement in the NV concentration (up to ∼1011 NV/cm2), without degradation in their coherence time of ∼180 μs. We address the potential of this technique toward the study of many-body physics of NV ensembles and the creation of non-classical spin states for quantum sensing.
UR - http://www.scopus.com/inward/record.url?scp=85029744058&partnerID=8YFLogxK
U2 - 10.1063/1.4993257
DO - 10.1063/1.4993257
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AN - SCOPUS:85029744058
SN - 0003-6951
VL - 111
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 12
M1 - 123101
ER -