title: Photo-assisted proton exchange and chemical etching on Fe-doped lithium niobate crystals.
abstract: We report the photo-assisted proton exchange and chemical etching on Fe-doped LiNbO(3) crystals. Selective proton exchange and chemical etching are realized through the 455nm-laser irradiation on the crystal surface in pyrophosphoric acid. Optical microscopy and Micro-IR spectroscopy analysis show that the hydrogen incorporation is confined spatially by the laser irradiation. Moreover, under the laser irradiation, + z surface is found to be more easily etched than -z surface. This unexpected etching anisotropy is attributed to the photogalvanic effect of the crystal.
authors.forename: Guohong
authors.initials: G
authors.lastname: Liang
authors.forename: Wenbo
authors.initials: W
authors.lastname: Yan
authors.forename: Donghui
authors.initials: D
authors.lastname: Wang
authors.forename: Lihong
authors.initials: L
authors.lastname: Shi
authors.forename: Xuju
authors.initials: X
authors.lastname: Jiang
authors.forename: Zujian
authors.initials: Z
authors.lastname: Shang
authors.forename: Fangdong
authors.initials: F
authors.lastname: Zhang
authors.forename: Fangfang
authors.initials: F
authors.lastname: Jia
authors.forename: Shaobei
authors.initials: S
authors.lastname: Li
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Lixia
authors.initials: L
authors.lastname: Zhang
authors.forename: Jianli
authors.initials: J
authors.lastname: Jing
authors.forename: Meng
authors.initials: M
authors.lastname: Wu
authors.forename: Yuwei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guifeng
authors.initials: G
authors.lastname: Chen
authors.forename: Hongjian
authors.initials: H
authors.lastname: Chen