中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64202-064202.doi: 10.1088/1674-1056/23/6/064202
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
王晓雷a, 费扬a, 李璐杰a, 王强a, 朱竹青b
Wang Xiao-Lei (王晓雷)a, Fei Yang (费扬)a, Li Lu-Jie (李璐杰)a, Wang Qiang (王强)a, Zhu Zhu-Qing (朱竹青)b
摘要: According to electro-optical sampling theory, we propose a new method to detect the spatiotemporal field of a single-shot terahertz pulse by spectral holography for the first time. The single-shot terahertz pulse is coupled into a broadened chirped femtosecond pulse according to electro-optical sampling theory in the detecting system. Then the reference wave and the signal wave are split by Dammann grating and spread into the interference band-pass filter. The filtered sub-waves are at different central-frequencies because of the different incident angles. These sub-waves at different central-frequencies interfere to form sub-holograms, which are recorded in a single frame of a charge coupled device (CCD). The sub-holograms are numerically processed, and the spatiotemporal field distribution of the original terahertz pulse is reconstructed. The computer simulations verify the feasibility of the proposed method.
中图分类号: (Holography)