Fig. 1. Schematic diagram of PBS structure

Fig. 2. Effective indices of the fundamental modes vary with the thickness of the SiO₂ interlayer. The insets show the electrical field profiles of the two fundamental modes in the input HPW

Fig. 3. The effective indices of the fundamental modes in HPW and TE/TM-cross waveguides vary with the width of their waveguides

Fig. 4. The polarization conversion efficiency of TE and TM modes in HPW as a function of coupling length

Fig. 5. Light propagation of PBS

Fig. 6. Wavelength dependence of transmission for both TE and TM modes

Fig. 7. The electric field distribution for the TE mode when the thickness of the waveguide changes

Fig. 8. Variations of PER and IL in different fabrication tolerance for TE and TM modes