强场太赫兹脉冲波形和频谱的单发测量技术  

Single-Shot Waveform and Spectrum Measurement Techniques for Strong Field Terahertz Pulses

作　　者：雷弘毅 孙方正 陈浩 卫妍玉 张保龙 廖国前[1,3] 李玉同 Lei Hongyi;Sun Fangzheng;Chen Hao;Wei Yanyu;Zhang Baolong;Liao Guoqian;Li Yutong(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,Guangdong,China;Collaborative Innovation Center of IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]中国科学院物理研究所北京凝聚态物理国家研究中心,北京100190 [2]中国科学院大学物理科学学院,北京100049 [3]松山湖材料实验室,广东东莞523808 [4]上海交通大学IFSA协同创新中心,上海200240

出　　处：《中国激光》2023年第17期3-12,F0002,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(12122415,12175306,92050106,11827807,92250307);国家重点研发计划(2021YFA1601700,2021YFA1400204);中国科学院稳定支持基础研究领域青年团队计划(YSBR-059)。

摘　　要：基于超快超强激光的强场太赫兹辐射源通常具有较低的重复频率,此类辐射源的表征和应用对太赫兹时域波形和频谱测量技术提出了新要求。介绍了中国科学院物理研究所光物理重点实验室发展的几种针对太赫兹脉冲时域波形和频谱的单发测量系统,重点讨论了每种方案的设计原理和特点。这些单发探测方案适用于低重复频率的强场太赫兹脉冲源,有助于准确表征太赫兹辐射性质、深入理解太赫兹产生机制、拓展强场太赫兹应用范围。Significance Terahertz(THz)radiation has emerged as a crucial tool in various research domains,including matter manipulation,electron acceleration,and biological physics.The distinct properties of THz radiation are attributed to its unique frequency range between the far infrared and microwave regions,which covers the vibrational and rotational frequency of numerous materials,whereby THz radiation acts as an effective tool for resonant manipulation of such materials.Furthermore,the smaller wavelength of THz radiation than microwaves and the short duration of pulsed terahertz sources result in high peak field strength,presenting an enormous potential for nonlinear matter control and electron acceleration.Terahertz spectroscopy serves as a fundamental component of terahertz application research.However,its unique frequency range presents challenges in detecting terahertz spectrum,as traditional electronic and optical methods are not readily applicable.Intuitively,terahertz energy can be measured with energy meters such as bolometers or pyroelectric detectors.Through the scanning by the terahertz bandpass filter,the terahertz spectrum can be measured.The most prevalent technique for terahertz spectrum detection is the scanning free-space electro-optical sampling method,which necessitates multiple shots to measure the terahertz timedomain waveform.The frequency spectrum can be obtained with a Fourier transformation of the time-domain waveform.However,for low repetition rate terahertz sources and irreversible processes,the scanning method is challenging to utilize,necessitating the development of single-shot terahertz detection techniques.Progress This study presents various single-shot terahertz time-domain waveform and frequency spectrum measurement techniques.The first section discusses single-shot time-domain waveform measurement methods,where the fundamental concept is to encode terahertz time-domain information into the properties of the probe laser,including spectral-encoding and spatial-encoding methods.The ch

关 键 词：测量 太赫兹辐射 电光采样 自相关测量 

分 类 号：O433.1[机械工程—光学工程]