Probe of symmetry reduction at domain walls by nonlinear Cherenkov measurement.
نویسندگان
چکیده
We report on the investigation of symmetrical properties of lithium niobate (LiNbO3) domain walls utilizing the nonlinear Cherenkov radiation. Compared with LiNbO3 bulk crystals, new nonzero elements of the χ(2) tensor at domain walls are found by the Cherenkov second harmonic generation (CSHG) and Cherenkov sum frequency generation (CSFG) measurement. Experimentally, we demonstrate the symmetry reduction of domain walls, where the mirror inversion symmetry of LiNbO3 lattice is broken while the threefold rotational symmetry still remains.
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ورودعنوان ژورنال:
- Optics express
دوره 24 26 شماره
صفحات -
تاریخ انتشار 2016