A gradual light-weight waveguide has powerful light-weight–matter conversation and so can boost the nonlinear system. The investigate of your LNPhC gradual mild waveguide started from the bulk LNPhC. Iliew et al. made use of a bulk LNPhC As an example that the bulk bands can be employed for section matching. https://lithium-niobate-crystal80235.like-blogs.com/32346688/5-simple-statements-about-lithium-niobate-crystal-explained