Fig. 1. Four-part grating-waveguide composite structure and continuous spectral bound states^[59]. (a) Schematic of unit cell of four-part grating-waveguide composite structure; (b) physical mechanism of formation of continuous spectral bound states

Fig. 2. Zero-order reflectance spectra of grating-waveguide composite structure for different δ and corresponding electric field intensity distributions at reflectance peaks^[59]

Fig. 3. Dependence of Q factor on geometric parameter δ^[59]

Fig. 4. Analysis of the Goos-Hänchen shift for different δ^[59]. (a) Reflectance angular spectrum, (b) reflection phase angular spectrum, and (c) Goos-Hänchen shift angular spectrum for δ=0.2; (d) reflectance angular spectrum, (e) reflection phase angular spectrum, and (f) Goos-Hänchen shift angular spectrum for δ=0.1

Fig. 5. Dependence of peak value of Goos-Hänchen shift on geometric parameter δ^[59]

Fig. 6. Diagrams, reflectance spectra, and effective electromagnetic parameter spectra of 1DPCs^[60]. Diagrams of (a) (ABA)^N and (d) (CDC)^M; (b)(e) corresponding reflectance spectra for N=13 and M=13; (c)(f) corresponding effective electromagnetic parameter spectra

Fig. 7. Analysis of the imaginary impendences and the imaginary phases of two 1DPCs in the heterostructure (ABA)N(CDC)M[60]. (a) Schematic of the heterostructure (ABA)^N(CDC)^M; (b) imaginary impendence angular spectra of two 1DPCs; (c) reflectance angular spectra of the (ABA)^N(CDC)^M heterostructures; (d) dependence of the reflectance of the interface state on the mismatch degree between the imaginary phases of two 1DPCs

Fig. 8. Magnetic field intensity distributions of the heterostructure (ABA)^N(CDC)^M under different Nand M^[60]. (a) N=13, M=13; (b) N=13, M=14; (c) N=13, M=20

Fig. 9. Analysis of the increase of Goos-Hänchen shift of the heterostructure (ABA)¹³(CDC)^20[60]. (a) Reflectance angular spectrum; (b) reflection phase angular spectrum; (c) Goos-Hänchen shift angular spectrum

Fig. 10. Calculation and simulation of the Goos-Hänchen shift of the heterostructure (ABA)⁸(CDC)^14[60]. (a) Reflectance angular spectra; (b) Goos-Hänchen shift angular spectra; (c) simulated magnetic field intensity distribution