Electromagnetically induced grating based on Zeeman coherence oscillations in cases beyond the multi-photon resonance condition

摘要

We present a theoretical study on the generation of an electromagnetically induced grating (EIG), based on Zeeman coherence oscillations, in a duplicated two-level atomic system. We show that the pure amplitude grating is obtained in the resonance case of multi-photon detuning. In this system, transferring of light energy from the zero order to the first order occurs by tuning the intensity and detuning of the coupling field. Physical mechanisms of the results are discussed using cases beyond the multi-photon resonance condition. Additionally, in the duplicated two-level system, we can create a two-dimensional EIG by splitting the coupling field into two orthogonal components. Optical properties of the proposed two-dimensional grating are also controlled by the intensity and detuning of the coupling field. (c) 2018 Optical Society of America