this to be used giving a short introduction to the paper examining the ionisation process

going on during elimination of nitrogen vacancy defect indictment

indeed effect and diamond is a single foot an amateur it gives that's fluorescence emission

which can be detected the confocal microscope at room temperature

indeed effect contains an election spin and a new peers been yet occurrence been can

be initialize and read out optically

these properties especially the long coherence times makes the envy defect a candidate for the

application of a quantum register

furthermore it has been demonstrated that the envied effect can serve as a magnetic and

electric field sensor

all these applications are based on the negatively charged envied effect

but there is also another charge state of envy

if one electron is removed we get the neutrally charged and we center

this chart state is actually a part of the process but hidden

by illumination with highly the power the charts data switching at a very fast rate

these ionisation and recombination processes can be slow down by changing the excitation wavelength and

lowering the intensity

the time traits shows the blinking between chart states on a time scale of seconds

that's have a closer look on the time trace

we have single burst that can be assigned to a chart state

that i've ever since level we are in the new minus state the low fluorescence

level belongs to the n b zero state

the time the envy defect resides in the any minus and then be zero state

can be determined by analysing the time tries

furthermore defer sense level gives us direct information about and b minus absorption

the probability to be in your mind as they can be determined but it opens

as shown in the formula

we examine to dependence of these processes on the excitation wavelength and power

in the graph you can see d n b minus probability plotted versus the excitation

wavelength

for broad range of excitation wavelengths and maximum and b minus probability of seventy percent

can be observed

in addition to this we succeeded in measuring the intrinsic absorption spectra from be minus

the results help us an understanding how the chart state switching is working

the ionisation from n b minus trained with zero functions as a twofold and process

for a broad range of excitation wavelengths

a first photonic sides and b minus

a second photo lifts the electron into the conduction bent

consequently in be minus has been ionised and we end up in the n b

zero state

recombination works accordingly

a first photo excites and v zero and the second courses to capture of an

electron ending up in the n b minus crone state

if it to foreign process can cause the ionisation with higher for to manage it

should also be possible to ionised in be detected only one photon

this is exactly what we have observed

liu illumination excites an electron from the ground state directly into the conduction band

the recombination process is also possible with one photon

the thing that charge state detection method enabled us to determine the exact energetic localisation

of n b minus crone stayed within the band k

the results of this paper are important for the implementation of high resolution microscopy techniques

that are based on stochastic blinking

multiple in v centres in a diffraction limited area cannot be resolved because they're all

the meeting photons at a time

a switching of charge states allows us to localise envied effects be on t diffraction

blurring

furthermore the charts the detection method can be used to initialize the chart state with

fidelity of almost hundred percent

in the future d measurement of charge state dynamics of envy centres of make it

possible to send surrounding charts concentration since it influences defame eleven endowment