An Electro-optic Tunable Wavelength Selector Using Piezoelectric-piezomagnetic Superlattices

An Electro-optic tunable wavelength selector (WS) using piezoelectric-piezomagnetic superlattices (PPSs) with an external DC electric field is presented. The band gap can be observed in the coupled polaritonic band structure from the transfer matrix method and Bloch's theorem. The proposed PPSs have the function of wavelength selection at the critical frequency between the passband and the forbidden band. The critical frequency and the selected wavelength can be tuned by an external DC electric field via the Electro-optic effect. Therefore, the proposed PPSs can be explored to construct the Electro-optic tunable wavelength selector.