Near-infrared(NIR)light is an important method in the optical manipulation of spin states in nitro-gen-vacancy(NV)center in diamond,which has a significant influence on the spin and charge state popula-tion.Therefore,it is of great significance to quantitatively study the effect of NIR light on the spin dynamics of NV center.In this paper,the time-resolved fluorescence of a single NV center under continuous 532 nm la-ser was measured experimentally at room temperature.The transition rates between energy levels were ob-tained through numerical simulation by establishing a seven-level model.On this basis,1 040 nm laser was used to modulate the time-resolved fluorescence of NV center,and the experimental data were in good agree-ment with the numerical simulation.The results show that the influence of NIR light on the NV center spin dynamics mainly lies in the improvement of charge state conversion rate.The ionization rate and recombina-tion rate can be increased by about 15 and 30 times respectively via irradiation of 1 040 nm laser with 40 mW power and 532 nm laser together.
nitrogen-vacancy(NV)center in diamondspin dynamicscharge statenear-infrared(NIR)lasernumerical simulation
维普
万方数据
