基于线性加速器的飞秒太赫兹脉冲的产生、传输与探测。

Generation, transport, and detection of linear accelerator based femtosecond-terahertz pulses.

作者信息

Park Jaehun, Kim Changbum, Lee Jongseok, Yim Changmook, Kim Chul Hoon, Lee Junghwa, Jung Seonghoon, Ryu Jaehyun, Kang Heung-Sik, Joo Taiha

机构信息

Pohang Accelerator Laboratory, POSTECH, Pohang, Republic of Korea.

出版信息

Rev Sci Instrum. 2011 Jan;82(1):013305. doi: 10.1063/1.3529921.

DOI:10.1063/1.3529921

PMID:21280823

Abstract

The generation and detection of intense terahertz (THz) radiation has drawn a great attention recently. The dramatically enhanced energy and peak electric field of the coherent THz radiation can be generated by coherent superposition of radiated fields emitted by ultrafast electron bunches. The femtosecond (fs)-THz beamline construction at the Pohang Accelerator Laboratory (PAL) was completed in the end of 2009. The fs-THz beamline at PAL can supply ultrafast and intense fs-THz radiation from a 75 MeV linear accelerator. The radiation is expected to have frequency up to 3 THz (∼100 cm(-1)) and the pulse width of <200 fs with pulse energy up to 10 μJ. This intense THz source has great potential for applications in nonlinear optical phenomena and fields such as material science, biomedical science, chemistry, and physics, etc.

摘要

近年来，强太赫兹（THz）辐射的产生与探测备受关注。超快电子束团发射的辐射场通过相干叠加，可产生能量和峰值电场显著增强的相干太赫兹辐射。浦项加速器实验室（PAL）的飞秒（fs）-太赫兹光束线建设于2009年底完成。PAL的飞秒-太赫兹光束线可从一台75 MeV直线加速器提供超快且强的飞秒-太赫兹辐射。预计该辐射频率高达3太赫兹（~100 cm⁻¹），脉冲宽度<200飞秒，脉冲能量高达10 μJ。这种强太赫兹源在非线性光学现象以及材料科学、生物医学科学、化学和物理等领域具有巨大的应用潜力。