The relationship between the effective refractive index difference between the bar waveguide grating and the groove waveguide grating interface as a function of etching depth.
The relationship between the effective refractive index difference of the interface between strip waveguide grating and slot waveguide grating and the variation of etching depth.
Relationship between effective refractive index difference of interface between strip waveguide grating and groove waveguide grating and etching depth.