Generation of Circularly Polarized Strong-Field Terahertz Waves  

作　　者：Jiang-Hao Li Hong-Ting Xiong De-Yin Kong Wei-Peng Zhao Shao-Jie Liu Bao-Gang Quan Xiao-Jun Wu 李江皓;熊虹婷;孔德胤;赵蔚鹏;刘少杰;全保刚;吴晓君(School of Electronic and Information Engineering,Beihang University,Beijing 100191,China;Zhangjiang Laboratory,Shanghai 201210,China;Department of Physics,Hong Kong University of Science and Technology,Hong Kong,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Material Laboratory,Guangdong 523808,China;University of Chinese Academy of Sciences,Beijing 100049,China;Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;International Terahertz Research Center,Hangzhou International Innovation Institute,Beihang University,Hangzhou 311115,China)

机构地区：[1]School of Electronic and Information Engineering,Beihang University,Beijing 100191,China [2]Zhangjiang Laboratory,Shanghai 201210,China [3]Department of Physics,Hong Kong University of Science and Technology,Hong Kong,China [4]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [5]Songshan Lake Material Laboratory,Guangdong 523808,China [6]University of Chinese Academy of Sciences,Beijing 100049,China [7]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [8]International Terahertz Research Center,Hangzhou International Innovation Institute,Beihang University,Hangzhou 311115,China

出　　处：《Chinese Physics Letters》2024年第12期60-70,共11页中国物理快报（英文版）

摘　　要：Terahertz(THz)circular dichroism(TCD)spectroscopy is extensively used to examine the chiral properties of biological macromolecules and other materials.The rapid advancements in strong-field THz generation and fieldmodulated techniques highlights the importance of advancing tunable strong-field TCD spectroscopy technology.In this study,we designed and implemented an integrated strong-field TCD spectroscopy system.By using a tilted-pulse-front technique,we generated linearly polarized strong-field THz radiation and achieved linear-tocircular polarization conversion via a reflective metasurface.The resulting circularly polarized THz radiation exhibited an ellipticity greater than 0.9 in the frequency range of 0.38-0.61 THz,achieving a linear-to-circular conversion efficiency exceeding 90%.Additionally,the peak electric field strength of the circularly polarized THz radiation exceeded 100 kV/cm.The proposed system is expected to be instrumental in investigating the chiral characteristics of materials under strong field conditions and in examining how these characteristics vary under different field conditions.

关 键 词：POLARIZATION REFLECTIVE CIRCULAR 

分 类 号：O441.4[理学—电磁学]