Realization of Double Fano Resonances with a Insb-Doped Fabry-Perot Cavity

In this paper, a one-dimensional photonic structure composed of a Fabry-Perot cavity based on semiconductor material indium antimonide (InSb) and common photonic crystals is proposed for the realization of double Fano resonance (DFaR), using the transfer matrix method. The Fabry-Perot cavity serves as a structure to generate single Fano resonance (SFaR), and the ordinary photonic crystals provide a continuous transmission spectrum as a continuous state. The appearance of DFaR is ascribed to the interference phenomenon between SFaR and continuous state, the analogy with a triple coupled oscillator model in mechanics. The effects of the properties for InSb (temperature, magnetic induction intensity), structural parameters, and incident angle on SFaR and DFaR are discussed, respectively. Under the optimal parameters, the variety of magnetic fields leads to the variation of transmission peak values for SFaR and DFaR, and transformations in temperature can cause the frequency points to shift. Based on the characteristics of DFaR, these obtained results can provide ideas for designing multi-measuring optical filters, lasers, slow light devices, and multi-node optical switches