Open AccessObservation of spontaneous polarization misalignments in periodically poled crystals using second-harmonic generation microscopy
Author(s) -
Yu-Yi Tzeng,
Zong-Yan Zhuo,
Ming-Yin Lee,
Chien-Sheng Liao,
Pei-Chun Wu,
Chin-Jie Huang,
MingChe Chan,
TzuMing Liu,
Yen-Yin Lin,
ShiWei Chu
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.011106
Subject(s) - poling , second harmonic generation , optics , second harmonic imaging microscopy , materials science , microscopy , polarization (electrochemistry) , nonlinear optics , optical microscope , optoelectronics , laser , physics , ferroelectricity , chemistry , scanning electron microscope , dielectric
Periodically poled crystal (PPC) is a key component for nonlinear optical applications. Its poling quality relies largely on successful domain inversion and the alignment of spontaneous polarization (SP) vectors in each domain. Here we report the unexpected observation of bulk second harmonic generation (SHG) in PPC when excitation propagating along its optical axis. Based on its tensorial nature, SHG is highly sensitive to the orientation of SP, and therefore the misalignment of SP in each domain of PPC can be revealed noninvasively by SHG microscopy. This nonlinear imaging modality provides optical sectioning capability with 3D sub-micrometer resolution, so it will be useful for in situ investigation of poling quality in PPC.
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