Optical nonreciprocity in rotating diamond with nitrogen-vacancy center

TL;DR

This paper proposes a theoretical method to achieve optical nonreciprocity using a rotating nano-diamond with a nitrogen-vacancy center, exploiting Doppler shifts and electromagnetically-induced transparency to control light transmission.

Contribution

It introduces a novel approach to realize optical nonreciprocity by combining rotation-induced Doppler effects with EIT in NV centers.

Findings

Nonreciprocal light transmission achieved in the model

Doppler effect enables direction-dependent transparency

Potential applications in optical isolators

Abstract

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