Observation of spontaneous polarization misalignments in periodically poled crystals using second-harmonic generation microscopy

Yu Yi Tzeng*, Zong Yan Zhuo, Ming Yin Lee, Chien Sheng Liao, Pei Chun Wu, Chin Jie Huang, Ming-Che Chan, Tzu Ming Liu, Yen Yin Lin, Shi Wei Chu

*Corresponding author for this work

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2 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)11106-11113
頁數8
期刊Optics Express
19
發行號12
DOIs
出版狀態Published - 6 六月 2011

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