You'll find essentially two achievable reasons for the effective refractive index variation upon light irradiation: heating on the LiNbO3:Fe substrates and, For that reason, of your LC within the microchannel, and director reorientation in the electric area induced by light in the LiNbO3:Fe substrates. Bernal and co-workers enhanced the etching https://lithium-niobate-crystal13467.ezblogz.com/64128864/lithium-niobate-crystal-an-overview