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Irradiation-assisted photoelastic domain wall formation in X- and Y-cut lithium niobate

机译：X和Y切铌酸锂的辐照辅助光弹性畴壁形成

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Irradiation-assisted photoelastic domain wall formation in single-crystalline X- and Y-cut lithium niobate (LNO) is studied at low displacement doses, namely, up to a maximum of 2.5 X 10(-2) dpa and annealed at 270 degrees C. The formation of surface ridges (or striations) is observed and quantified using atomic force and optical microscopy. In spite of the different crystallographic orientation of the two single-crystals a correlation between the density of surface defects and the displacement dose is established phenomenologically which means that the displacement damage and its consequent defect accumulation behavior prior to annealing ('incubation phase') defines to which extent the lattice undergoes an irreversible mechanical deformation immediately after annealing. This ridge formation mechanism assisted by irradiation and moderate annealing constitutes a fine tool to modify the near-surface structure and the local optical properties of LNO and hence it allows one to potentially micromachine new photonic devices. (c) 2005 Elsevier Ltd. All rights reserved.
机译：在低位移剂量下，即最大2.5 X 10（-2）dpa并在270℃退火的情况下，研究了X-和Y-切割的单晶铌酸锂（LNO）中的辐照辅助光弹性畴壁形成使用原子力和光学显微镜观察并量化表面脊（或条纹）的形成。尽管两个单晶的晶体学取向不同，但表面现象密度与位移剂量之间的相关性在现象学上得以建立，这意味着位移损伤及其在退火（“保温阶段”）之前的缺陷累积行为决定了退火后，晶格在何种程度上立即发生不可逆的机械变形。这种由辐照和适度退火辅助的脊形成机制构成了一种修饰LNO的近表面结构和局部光学特性的优良工具，因此它使人们有可能对新的光子器件进行微加工。 （c）2005 Elsevier Ltd.保留所有权利。

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