Fig. 1. Schematic diagram of 1D RWG in full conical mounting. The structural parameters are n_H = 1.8, n_L = 1.63, n_s = 1.46, n_c = 1.0, d = 102 nm, f = 0.5, and Λ = 440 nm

Fig. 2. Calculated reflection spectra with the incident angle variation when the TM-polarized wave irradiates 1D RWG in full conical mounting

Fig. 3. Internal electric field (E_y) profile for (a) λ_R = 642.5 nm (θ = 0°); (b) λ_R = 578.6 nm (θ = 40°); (c) λ_R = 484.6 nm (θ = 80°)

Fig. 4. Calculated resonant positions based on the eigenvalue equation of fundamental TE guided mode at different incident angles

Fig. 5. Calculated resonant positions based on the eigenvalue equation of fundamental TE and TM guided modes at different incident angles

Fig. 6. Reflection spectra of equivalent multilayer stacks at different incident angles. (a) TE-polarized incidence; (b) TM-polarized incidence

Fig. 7. Resonant wavelength as a function of the incident angle

Fig. 8. Resonant wavelength as a function of the k value and the incident angle