Effect of Laser Radiation near 1.5 $μ$m on the Photoluminescence Parameters and the Ensemble of NV Centers in Diamond

Abstract

The effect of laser radiation with a wavelength near 1.55 $μ$$m on the photoluminescence properties of ``nitrogen-vacancy’’ (NV) color centers in diamond has been studied experimentally. The effect of radiation of an infrared laser on the charge state of color centers redistributes the spectral intensity of photoluminescence in the ensemble of NV centers. In the case of neutral NV centers, the quenching of photoluminescence reaching about 60% has been observed. A feature of the laser excitation of NV centers by this method is the absence of competition with stimulated emission and two-photon excitation, which is observed with an increase in the power of infrared radiation at other wavelengths.