Three-dimensional ferroelectric domain visualization by Cerenkov-type second harmonic generation.
Three-dimensional ferroelectric domain visualization by Cerenkov-type second harmonic generation.
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DOI：
10.1364/oe.18.016539
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发表时间：
2010-08
期刊：
影响因子：
3.8
通讯作者：
Y. Sheng;A. Best;H. Butt;W. Krolikowski;A. Arie;K. Koynov
中科院分区：
文献类型：
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作者：
Y. Sheng;A. Best;H. Butt;W. Krolikowski;A. Arie;K. Koynov
我们发现，将激光聚焦到反平行铁电畴之间的边界上导致两个二次谐波（SH）光束的非共线产生。光束以满足切伦科夫型相位匹配条件的角度在垂直于域边界的平面中发射。此外，当激光聚焦在单个域的均匀部分上时，这些光束消失。我们利用这种效果的三维可视化的铁电畴图案的细节与亚微米精度。
We show that focusing a laser light onto the boundary between antiparallel ferroelectric domains leads to the non-collinear generation of two second harmonic (SH) beams. The beams are emitted in a plane normal to the domain boundaries at the angles that satisfy the Cerenkov-type phase matching condition. Moreover, these beam disappear when the laser light is focused on a homogenous part of a single domain. We utilize this effect for 3-dimensional visualization of fine details of the ferroelectric domain pattern with a submicron accuracy.