强场宽带太赫兹波辐射的研究进展  

Research Progress on Intense,Broadband,Terahertz Wave Radiation

作　　者：赵航 赵跃进[1,3] 张亮亮[2] 张存林[2] Zhao Hang;Zhao Yuejin;Zhang Liangliang;Zhang Cunlin(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Department of Physics,Capital Normal University,Beijing 100048,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314019,Zhejiang,China)

机构地区：[1]北京理工大学光电学院,北京100081 [2]首都师范大学物理系,北京100048 [3]北京理工大学长三角研究院,浙江嘉兴314019

出　　处：《光学学报》2023年第15期399-420,共22页Acta Optica Sinica

基　　金：国家自然科学基金(61935001,12074272,62205020);国家重点研发计划(2020YFB2009303);中国博士后科学基金(2022M710372);北京市自然科学基金(JQ18015)。

摘　　要：太赫兹光谱分析和检测技术在材料特性研究、医学诊断、环境监控等方面具有广阔的应用前景。目前高性能太赫兹源的缺乏是太赫兹光谱检测和成像技术发展缓慢的制约因素之一。因此,强场宽带太赫兹源的开发一直是太赫兹领域的研究重点。综述超快飞秒激光脉冲驱动下强场太赫兹波辐射的研究进展,详述激光激励金属纳米薄膜、气体和液体中等离子体辐射宽频强场太赫兹波的现象和物理机制,并比较了各种强场太赫兹产生方法的特点和优缺点,最后讨论基于超快激光激发物质产生太赫兹波的发展前景及所面临的挑战。Significance The terahertz(THz)range(0.1-10 THz)lies between the microwave and infrared region in the electromagnetic spectrum and is characterized by low photon energy and strong penetration.The THz range covers the spectra attributed to the intermolecular vibrations and rotational energy levels of various organic and biological macromolecules.Terahertz technology realizes the integration of electronics and photonics,offering tremendous development potential in fields such as military applications,biomedical applications,and future communications.However,before mid-1980s,research on the nature of terahertz radiation could not be conducted owing to the absence of effective generation and detection methods with respect to electromagnetic radiation in the terahertz frequency range.The subsequent rapid advancement in ultrafast laser pulse technology offered a stable and effective excitation source for generating terahertz pulses.However,owing to the low output power of existing terahertz-radiation sources and the high thermal-radiation background in the terahertz frequency range,new sources need to be developed to meet high requirements in terms of energy,bandwidth,and other performance characteristics.Terahertz radiation can be generated through several methods,including optical methods,terahertz quantum cascade lasers,and solid electronic devices.This study primarily focuses on optical devices used for generating terahertz radiation.The femtosecond laser pulse,characterized by low repetition rates and high energy,can serve as the pump source,triggering strong nonlinear effects in various targets,thus generating strong terahertz radiation.This radiation affords manipulation and control over complex condensed-matter systems.Moreover,this method of generating terahertz radiation has been studied extensively,and the material state covers solid,gas,and liquid.However,sources that can emit terahertz radiation having high energy and a broad frequency spectrum are still lacking.If a broadband strong terahertz source with

关 键 词：超快光学 太赫兹辐射 金属薄膜 气体等离子体 液体等离子体 

分 类 号：O436[机械工程—光学工程]