S. Mailis et al., Fabrication of surface relief gratings on lithium niobate by combined UV laser and wet etching, ELECTR LETT, 36(21), 2000, pp. 1801-1803
Surface relief gratings have been fabricated on pure and Ti indiffused lith
ium niobate samples of x-cut and z-cut crystallographic orientations by a s
imple two-step process, which combines optical (pulsed ultra-violet laser)
and chemical etching.