DIAMOND NITROGEN VACANCY CENTER MAGNETIC FIELD SENSOR

摘要

The present invention relates to a method for improving the sensitivity in a diamond nitrogen vacancy magnetic field sensor, a diamond nitrogen-vacancy center (DNV) sensor is a cylindrical or prismatic mirror, which is provided inside one side of the mirror A first filter, a diamond, a hemispherical lens, a second filter and a photodetector attached to the mirror from one side opposite to the mirror, wherein the first filter, the diamond and the hemispherical lens are bonded with the diamond in the center, The first filter is a filter that does not pass a wavelength band of photons emitted while the diamond nitrogen-vacancy center returns from an excited state to a ground state, and the hemispherical lens may have a refractive index close to that of the diamond, Accordingly, by increasing the fluorescence emitted out of the diamond, the amount detected by the photodetector can be increased to increase the measurement sensitivity of the magnetic field sensor.