Nearly Diffraction-Free Nonlinear Imaging of Irregularly Distributed Ferroelectric Domains

作者：Ronger Lu, Ruizhi Zhao, Xia Feng, Bo Yang, Xuhao Hong, Chao Zhang, Yi-qiang Qin, Yong‐yuan Zhu · 发表于：Physical Review Letters · 年份：2018 · DOI：10.1103/physrevlett.120.067601 · 被引用次数：11 · 研究领域：Ferroelectric and Piezoelectric Materials、Photorefractive and Nonlinear Optics、Acoustic Wave Resonator Technologies

Second-harmonic generation is used experimentally for the nonlinear imaging of two-dimensional irregular domain structures. Analytical solutions and simulation results for the Fresnel distribution of domain walls are obtained. The results show that the domain wall plays an important role in the imaging process and the corresponding diffraction effect is greatly suppressed (we call it a nearly diffraction-free effect), thus providing a simple way to realize high-resolution imaging for ferroelectric domains.