Qiang Wu, Qing-Quan Chen, Bin Zhang, Jing-Jun Xu()
Key Laboratory of Weak Light Nonlinear Photonics (Ministry of Education), TEDA Applied Physics School and School of Physics, Nankai University, Tianjin 300457, China
In this article, we primarily review the time-resolved imaging of THz phonon polariton, which is generated by femtosecond laser in ferroelectric crystal. We pay more attention to the imaging in thin crystal, which can be used as an integration platform for terahertz-optics or terahertz-electrics. The imaging techniques, which can get quantitatively in-focus time-resolved images, are introduced in more detail. They have made enormous progress in recent years, and are powerful tools for the research of phonon polariton, optics, and THz wave. We also briefly introduce the generation principle and general propagation properties of THz phonon polariton.
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