Focal Spot Imaging of Terahertz Subpicosecond Pulse by THz-Field-Induced Optical Second Harmonic Generation

O. V. Chefonov; A. V. Ovchinnikov; D. S. Sitnikov; M. B. Agranat

doi:10.1134/S0018151X19010036

Focal Spot Imaging of Terahertz Subpicosecond Pulse by THz-Field-Induced Optical Second Harmonic Generation

作者: Chefonov O.V.¹, Ovchinnikov A.V.¹, Sitnikov D.S.¹, Agranat M.B.¹
隶属关系:
1. Joint Institute for High Temperatures
期: 卷 57, 编号 1 (2019)
页面: 137-139
栏目: Short Communications
URL: https://journals.rcsi.science/0018-151X/article/view/157913
DOI: https://doi.org/10.1134/S0018151X19010036
ID: 157913

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详细

Optical imaging of spatial distribution of intensity in the focal spot of the terahertz pulse was developed. The technique is based on the THz electric field-induced second harmonic generation in the nonlinear centrosymmetric crystal (SrTiO₃). The measurements of the spatial distribution of focal spot of terahertz radiation with the electric field strength over 1 MV/cm were conducted.