Электронный спиновый резонанс NV-=SUP=-(-)-=/SUP=--центров в микрокристаллах синтетического флуоресцентного алмаза в условиях оптической спиновой поляризации

Electron paramagnetic resonance (EPR) spectra of synthetic diamond microcrystals with NV(-) centers have been studied. It is shown that under the conditions of irradiation of the material with the light of a xenon lamp at low temperatures ~100 K, the intensities of the EPR signals corresponding to the “forbidden” (dms=2) and low-field allowed (dms=1) transitions are amplified several times, while the EPR signals from paramagnetic nitrogen and impurity nickel in the charge state -1 practically do not change. This is due to a change in the population of levels of the ground triplet state of the NV(-) center and the optical polarization of spins in the state ms=0 of the triplet level.