Gong Jiang, Zong Rong, Li Hui, Duan Tao. Dynamically Tunable Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide[J]. Laser & Optoelectronics Progress, 2021, 58(3): 3160011
- Laser & Optoelectronics Progress
- Vol. 58, Issue 3, 3160011 (2021)
Fig. 1. Geometric structure of absorber. (a) Three-dimensional view of periodic unit cell; (b) top view of periodic unit cell; (c) side view of periodic unit cell
Fig. 2. Numerical results under different conductivities when electromagnetic wave is vertically incident. (a) Absorption spectra; (b) reflection spectra
Fig. 3. Absorptivity and relative impedance of absorber under different conditions. (a) (b) VO2 at metal phase; (c) (d) VO2 at insulation phase
Fig. 4. Electric field diagrams at different conductivities. （a） 100 S·m-1； （b） 1000 S·m-1； （c） 5000 S·m-1； （d） 30000 S·m-1
Fig. 5. Influence of opening size on absorber when absorptivity is 100 S·m-1 and 30000 S·m-1, respectively
Fig. 6. Absorption spectra under different conditions. (a) Different polarization angles; (b) TE wave, different incident angles; (c) TM wave, different incident angles
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