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Effects of low energy electron irradiation on formation of nitrogen-vacancy centers in single-crystal diamond
Exposure to beams of low energy electrons (2 to 30 keV) in a scanning
electron microscope locally induces formation of NV-centers without thermal
annealing in diamonds that have been implanted with nitrogen ions. We find that
non-thermal, electron beam induced NV-formation is about four times less
efficient than thermal annealing. But NV-center formation in a consecutive
thermal annealing step (800C) following exposure to low energy electrons
increases by a factor of up to 1.8 compared to thermal annealing alone. These
observations point to reconstruction of nitrogen-vacancy complexes induced by
electronic excitations from low energy electrons as an NV-center formation
mechanism and identify local electronic excitations as a means for spatially
controlled room-temperature NV-center formation
Optical determination and magnetic manipulation of single nitrogen-vacancy color center in diamond nanocrystal
The controlled and coherent manipulation of individual quantum systems is a
fundamental key for the development of quantum information processing. The
nitrogen-vacancy (NV) color center in diamond is a promising system since its
photoluminescence is perfectly stable at room temperature and its electron spin
can be optically read-out at the individual level. We review here the
experiments currently realized in our laboratory, concerning the use of single
NV color center as single photon source and the coherent magnetic manipulation
of the electron spin associated to a single NV color center. Furthermore, we
demonstrate a nanoscopy experiment based on saturation absorption effect, which
allows to optically pin-point single NV color center at a sub-? resolution.
This opens a possibility to independently address two or multiple
magnetically-coupled single NV color centers, which is a necessary step toward
the realization of a diamond-based quantum computer.Comment: 8 page
Vector magnetic field sensing by single nitrogen vacancy center in diamond
In this Letter, we proposed and experimentally demonstrated a method to
detect vector magnetic field with a single nitrogen vacancy (NV) center in
diamond. The magnetic field in parallel with the axis of the NV center can be
obtained by detecting the electron Zeeman shift, while the Larmor precession of
an ancillary nuclear spin close to the NV center can be used to measure the
field perpendicular to the axis. Experimentally, both the Zeeman shift and
Larmor precession can be measured through the fluorescence from the NV center.
By applying additional calibrated magnetic fields, complete information of the
vector magnetic field can be achieved with such a method. This vector magnetic
field detection method is insensitive to temperature fluctuation and it can be
applied to nanoscale magnetic measurement.Comment: 5 pages, 5 figure
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