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Opt Express. 2010 Aug 2;18(16):16539-45. doi: 10.1364/OE.18.016539.

Three-dimensional ferroelectric domain visualization by Cerenkov-type second harmonic generation.

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  • 1Max-Planck Institute for Polymer Research, Mainz 55128, Germany.


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.

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