Theoretical study on the polarization-separated and nonreciprocal tailored electromagnetically induced absorption with layered photonic structure

Abstract

In this paper, the behaviors of nonreciprocal and polarization-separated tailored electromagnetically induced absorption (EIA) realized by a layered photonic structure containing InSb are investigated by the transfer matrix method, which shows that the EIA peak can be up to 97.3 % and 98 % in the forward and backward propagation, and the interval between their frequency points of them can be up to 0.28 THz when the incident angle (θ) is 0° and the magnetic induction intensity (B) is 0 T. The theory of the two-oscillator model is used to further prove the reality of EIA. By adjusting θ to 36°, the frequency difference of the EIA peaks under the TE and TM waves is 4 GHz when B is 0 T, indicating a good capability of polarization separation (PS). With the alteration of the temperature, such a difference value is always larger than 3 GHz. With the escalation of θ, the frequency points of EIA of the forward and backward incidence is approximately 0.28 THz, and show good performance of PS. Besides, the adjustment of the number of periods and B can realize the function of regulating EIA. Depending on its high-quality factors and good sensitivity, this research is of great help in realizing the sensors.