Fig. 1. Structure of dual-channel narrow bandwidth MA

Fig. 2. Absorption efficiency of dual-channel narrow bandwidth MA

Fig. 3. Effective impedance of MA. (a) Real part; (b) imaginary part

Fig. 4. Distributions of electric and magnetic fields in dual-channel narrow bandwidth MA. (a)(c) Electric and magnetic field distributions of MA at wavelength λ₁=1.1005 μm; (b)(d) electric field and magnetic distributions of MA at wavelength λ₂=1.19024 μm

Fig. 5. Effect of P on absorption characteristics of dual-channel narrow bandwidth MA. (a) Absorption spectra; (b) absorption wavelength

Fig. 6. Effect of n on absorption characteristics of dual-channel narrow bandwidth MA. (a) Absorption spectra; (b) absorption wavelength

Fig. 7. Effect of d on absorption characteristics of dual-channel narrow bandwidth MA. (a) Absorption spectra; (b) absorption wavelength

Fig. 8. Effect of d on n_eff

Fig. 9. Magnetic field distributions of MA at λ₂ under different d values. (a) d=0.2 μm; (b) d=0.1 μm; (c) d=0.05 μm

Fig. 10. Magnetic field distributions of MA at λ₁ under different d values. (a) d=0.2 μm; (b) d=0.1 μm; (c) d=0.05 μm

Fig. 11. Effect of t on absorption characteristics of dual-channel narrow bandwidth MA. (a) Absorption spectra; (b) absorption wavelength