Fig. 1. Structural diagram of subwavelength textured PEC cylinder

Fig. 2. Scattering and absorption cross-sections of two-dimensional textured PEC cylinders. (a) Simulated normalized scattering cross section of textured PEC cylinder varies with frequency ω and loss factor γ; (b) scattering spectra for γ of 0.02, 0.04, 0.06, 0.08, and 0.10; (c) simulated normalized absorption cross section of textured PEC cylinder varies with frequency ω and loss factor γ; (d) absorption spectra for γ of 0.02, 0.04, 0.06, 0.08, and 0.10

Fig. 3. Underlying mechanism of lossless SLSPs resonance mode. (a) Excited electric field distributions at ω/ωa=0.99 [absorption dip in Fig. 2(d)] while loss factor is γ=0.01 (right panel shows field of whole cylinder, and left panel shows enlarged view of fan-shaped box with dotted line in right panel); (b) angular distribution of excited electric field at position ρ=0.6R (180° direction is on left side of cylinder, and 0° direction is on right side of cylinder); (c) electric field distributions of eigenmode at ω/ωa=0.99 while loss factor is γ=0.01 (right panel shows eigenmode field distribution of cylinder, and left panel shows enlarged view of fan-shaped box with dotted line in right panel); (d) angular distribution of eigenmode electric field at position ρ=0.6R

Fig. 4. Generality of lossless resonance mode. (a) Normalized scattering cross sections of textured PEC cylinder varying with frequency; (b) normalized absorption cross sections varying with frequency; (c) excited electric field distribution and (d) electric field distribution of eigenmode at ω/ωa=0.987 while loss factor γ=0.10