微纳光学结构与太赫兹辐射产生技术的研究进展  

Research Progress of Micro-Nano Optical Structure and Terahertz Radiation Generation Technology

作　　者：韩张华 孙开礼 蔡阳健 Han Zhanghua;Sun Kaili;Cai Yangjian(Center of Light Manipulation and Applications,Shandong Normal University,Jinan,Shandong 2503058,China;Shandong Provincial Key Laboratory of Optics and Photonic Devices,Jinan,Shandong 250358,China;Shandong Provincial Engineering and Technical Center of Light Manipulations,Jinan,Shandong 250358,China)

机构地区：[1]山东师范大学光场调控及应用中心,山东济南250358 [2]山东省光学与光子器件技术重点实验室,山东济南250358 [3]山东省光场调控工程技术中心,山东济南250358

出　　处：《光学学报》2021年第8期258-270,共13页Acta Optica Sinica

基　　金：国家自然科学基金(11974221,11525418,91750201,11974218)。

摘　　要：太赫兹(THz)技术在基础研究与产业应用中具有重要研究意义,但其广泛应用仍受限于高效、紧凑的THz源,特别是0.5~2.0 THz波段。目前,人们已经采用了多种技术产生THz辐射,基于光学的方法是其中最重要的手段。首先,针对THz脉冲波及连续波,基于光电导效应及非线性光学差频的THz辐射产生机理,总结了近年来微纳光学结构在提高泵浦光至THz转换效率上的应用。然后,分析了金属纳米光天线通过增强泵浦光局域电场提高THz辐射效率和将金属纳米光天线作为THz辐射源两种增强情况。最后,展望了其他类型的光学微纳结构,尤其是全介质光学天线支持的米氏谐振、无辐射模式以及连续域中束缚态等新颖物理现象在THz辐射产生中的增强作用。Terahertz(THz)technology plays a significant role in basic research and industrial applications.However,the wide application of it is still limited by efficient and compact THz sources,especially in the 0.5-2.0 THz band.Currently,researchers have adopted various technologies to generate THz radiations,in which the optical-based methods are the most important means.In this paper,first,for the THz pulse and continuous waves,the THz radiation generation mechanism based on the photoconductivity effect and nonlinear optical difference frequency are summarized with the application of micro-nano optical structures to improve the conversion efficiency from the pump light to THz radiation.Then,two enhancement situations of the metal nano-optical antenna by enhancing the local electric field of the pump light to improve the THz radiation efficiency,and the metal nano-optical antenna as the THz radiation source are analyzed.Finally,the use of other optical micro-nanostructures in the generation of THz radiation have been outlooked,especially the enhancement effect of novel physical phenomena,such as Mie resonance,non-radiative mode and bound state in the continuous domain supported by all-dielectric optical antennas.

关 键 词：光学器件 太赫兹辐射 光学纳米天线 局域场增强 光电导天线 光整流 

分 类 号：O434[机械工程—光学工程]