Streaking of a Picosecond Electron Pulse with a Weak Terahertz Pulse,ACS Photonics

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Streaking of a Picosecond Electron Pulse with a Weak Terahertz Pulse
ACS Photonics ( IF 6.5 ) Pub Date : 2022-12-13 , DOI: 10.1021/acsphotonics.2c01304
Wataru Yajima ₁ , Yusuke Arashida ₁ , Ryota Nishimori ₂ , Yuga Emoto ₁ , Yuki Yamamoto ₁ , Kohei Kawasaki ₁ , Yuri Saida ₁ , Samuel Jeong ₁ , Keishi Akada ₁ , Kou Takubo ₃ , Hidemi Shigekawa ₁ , Jun-ichi Fujita ₁ , Shin-ya Koshihara ₃ , Shoji Yoshida ₁ , Masaki Hada _{1,

4}

Affiliation

Optoelectronic devices driven by terahertz (THz) waves have been used to control electron pulses, such as through acceleration, compression, and characterization of ultrashort pulsed electrons. In this study, we developed a THz generation setup with a lithium niobate crystal via the tilted-pump-pulse-front approach. Furthermore, a THz electro-optical sampling setup, an ultrashort pulsed electron generation system, and a THz streaking system with a simple butterfly-shaped THz optoelectronic resonator were also developed to determine the lower limits of THz intensities that can be used for characterization of picosecond pulsed electrons. Multiple deflections of the electron pulse occur when the duration is longer than the half cycle of the electric field at the THz optoelectronic resonator, which requires a higher THz intensity and makes the analyses difficult. The results obtained with appropriate analyses show that a weak THz field of a few kV/cm resonated with the THz optoelectronic device is sufficient to characterize picosecond pulsed electrons.

中文翻译：

皮秒电子脉冲与弱太赫兹脉冲的条纹

由太赫兹 (THz) 波驱动的光电设备已用于控制电子脉冲，例如通过超短脉冲电子的加速、压缩和表征。在这项研究中，我们通过倾斜泵浦脉冲前沿方法开发了带有铌酸锂晶体的太赫兹产生装置。此外，还开发了太赫兹电光采样装置、超短脉冲电子发生系统和带有简单蝴蝶形太赫兹光电谐振器的太赫兹条纹系统，以确定可用于表征皮秒的太赫兹强度下限脉冲电子。当持续时间长于太赫兹光电谐振器处电场的半个周期时，电子脉冲会发生多次偏转，这需要更高的太赫兹强度并使分析变得困难。通过适当的分析获得的结果表明，与太赫兹光电设备共振的几 kV/cm 的弱太赫兹场足以表征皮秒脉冲电子。

更新日期：2022-12-13

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