We studied the photo-assisted wet-etching effects in lithium niobate crystals with different compositions under different illuminating light wavelengths of 532nm, 488nm and 351nm. It is found that the properties of the photo-assisted wet-etching effect depend strongly on both the composition and the illuminating light. This phenomenon is of interest to the study and the fabrication of photonic surface-microstructure in lithium niobate. The involved mechanism is also qualitatively explained in this paper.
© 2005 Optical Society of America
X. Yu, J. Xu, H. Qiao, B. Tang, and H. Yu, "The photo-assisted wet-etching effect in lithium niobate crystals by laser irradiation at different wavelengths," in Photorefractive Effects, Materials, and Devices, G. Zhang, D. Kip, D. Nolte, and J. Xu, eds., Vol. 99 of OSA Trends in Optics and Photonics (Optical Society of America, 2005), paper 807.