Optical Nonreciprocity in Rotating Diamond with Nitrogen?Vacancy Color Centers

We theoretically propose a method to realize optical nonreciprocity in rotating nano-diamond with nitrogen-vacancy (NV) center. Because of the relative motion NV center respect propagating fields, frequencies fields are shifted due Doppler effect. When control and probe incident from same direction, two-photon resonance still holds as shifts two same. Thus, electromagnetically-induced transparency (EIT), light can pass through nearly without absorption. However, when propagate opposite directions, not effectively result breakdown resonance.