Patterning of non-linear optical crystals in glass by laser-induced crystallization
Patterning of non-linear optical crystals in glass by laser-induced crystallization
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DOI：
10.1111/j.1551-2916.2006.01441.x
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发表时间：
2007-03-01
影响因子：
3.9
通讯作者：
Fujiwara, T.
中科院分区：
文献类型：
--
作者：
Komatsu, T.;Ihara, R.;Fujiwara, T.
本文报道了用激光辐照在玻璃表面形成非线性光学晶体图形的最新进展。已经开发了两种用于写入晶体线的技术，即，稀土（钐）原子热处理和过渡金属原子热处理，其中对含有稀土（RE：Sm 3+，Dy 3+）离子或过渡金属（TM：Ni 2+，Fe 2+，V 4+）离子的玻璃照射连续波Nd：YAG激光（波长：λ =1064 nm）。已经成功地写入了显示二次谐波产生的晶体线，例如β-BaB 2 O 4、SmxBi 1-xBO 3和Ba 2 TiGe 2 O 8。从二次谐波强度的方位角依赖性和偏振显微拉曼散射光谱中可以清楚地看出，晶体线是由沿晶体线生长方向沿着高度取向的晶体组成的。也可以通过仅仅改变激光扫描方向来写入二维晶体弯曲或曲线。提出了激光诱导晶化的机理。
This paper reports recent progress in the patterning of non-linear optical crystals on the glass surface by laser irradiation. Two techniques for the writing of crystal lines have been developed, i.e., rare-earth (samarium) atom heat processing and transition metal atom heat processing, in which a continuous wave Nd:YAG laser (wavelength: lambda=1064 nm) is irradiated to the glasses containing rare-earth (RE: Sm3+, Dy3+) ions or transition metal (TM: Ni2+, Fe2+, V4+) ions. The writing of crystal lines such as beta-BaB2O4, SmxBi1-xBO3, and Ba2TiGe2O8 showing second harmonic generations has been successful. It is clarified from the azimuthal dependence of second harmonic intensity and polarized micro-Raman scattering spectra that crystal lines consist of highly oriented crystals along the crystal line growth direction. It is also possible to write two-dimensional crystal bending or curved lines by just changing the laser scanning direction. The mechanism of the laser-induced crystallization has been proposed.