Li Hui, Yu Jiang, Chen Zhe. Polarization-Independent and Incident-Angle-Insensitive Switchable Broadband Absorber/Reflector Based on Single-Layer Graphene[J]. Chinese Journal of Lasers, 2020, 47(8): 803001
- Chinese Journal of Lasers
- Vol. 47, Issue 8, 803001 (2020)
Fig. 1. Structural diagram of metamaterial absorption unit. (a) Three-dimensional diagram; (b) top-layer structure; (c) two-dimensional diagram
Fig. 2. Absorption spectra of proposed broadband absorber under different conditions
Fig. 3. Simulated absorption spectra of proposed broadband absorber
Fig. 4. Real and imaginary parts of relative impedance of proposed broadband absorber
Fig. 5. Surface current distribution of proposed broadband absorber under normal incidence when Ef=1.3 eV
Fig. 6. Effects of graphene Fermi energy levels on structural properties of proposed absorber. (a) Absorption spectra of proposed absorber under different graphene Fermi levels; (b) power loss density distributions of top patterned graphene layer at resonant frequency of 6.50 THz
Fig. 7. Absorption spectra of proposed broadband absorber under different polarization angles
Fig. 8. Schematic of oblique incidence of light wave under each polarization mode. (a) TE polarization mode; (b) TM polarization mode
Fig. 9. Absorption efficiency versus frequency and angle of incidence under each polarization mode. (a) TE polarization mode; (b) TM polarization mode
Fig. 10. Model based on transmission line theory. (a) Equivalent circuit diagram of broadband absorber; (b) comparison of absorption spectra
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