吸收率和吸收频率大小电热可调的超材料吸波体OA北大核心CSTPCD

A dual-tunable"perfect"metamaterial absorber composed of a"Tian-zi"-shaped bulk Dirac semimetal(BDS)resonator and strontium titanate(STO)is proposed in this work and systematically studied by performing numerical simulations.From the acquired results,it is demonstrated that the absorber can achieve 99%absorption rate at 2.613 1 THz when the BDS Fermi energy is 40 meV and the STO temperature is 400 K.Moreover,both dynamics dual-tuning of the absorption frequency and absorption rate of the absorber can be successfully achieved by varying the BDS Fermi energy level and the STO temperature.Additionally,the absorber's performance is the-oretically analyzed using both coupled mode theory(CMT)and equivalent circuit model(ECM).Finally,the changes in the absorber's absorption spectrum are further discussed when each parameter of the model is modi-fied,providing thus a solid theoretical basis for the design of dual-tunable filters and absorbers.