首页|Generation of Circularly Polarized Strong-Field Terahertz Waves

Generation of Circularly Polarized Strong-Field Terahertz Waves

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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 field-modulated 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-to-circular 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 100kV/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.

李江皓、熊虹婷、孔德胤、赵蔚鹏、刘少杰、全保刚、吴晓君

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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

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2024

10.1088/0256-307X/41/12/124201

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(12)