Wang Guoyang, Wu Ruoxi, Zhang Liangliang, Zhang Cunlin, Zhang X-C
Department of Physics, Key Laboratory of Terahertz Optoelectronics (MoE), Capital Normal University, Beijing 100048, China.
The Institute of Optics, University of Rochester, Rochester, NY 14627, USA.
Fundam Res. 2024 Aug 24;5(2):516-525. doi: 10.1016/j.fmre.2024.08.003. eCollection 2025 Mar.
Coherent detection measures both the amplitude and phase of pulsed terahertz (THz) waves simultaneously, forming the foundation for THz time-domain spectroscopy (THz-TDS). This technique has become increasingly prominent in the fields of physics and materials science, allowing researchers to investigate the dynamic properties of various dielectric materials within the 0.1 to 10 THz frequency range, which is previously a challenging spectrum to access. This paper reviews recent advancements and the challenges faced by commonly used coherent detectors in THz-TDS. Our discussion emphasizes the potential for new discoveries in THz photonics and highlights the crucial role of coherent detection in the study of laser-matter interactions.
相干检测可同时测量脉冲太赫兹（THz）波的幅度和相位，构成了太赫兹时域光谱技术（THz-TDS）的基础。该技术在物理和材料科学领域日益突出，使研究人员能够研究0.1至10太赫兹频率范围内各种介电材料的动态特性，而该频谱此前难以获取。本文综述了太赫兹时域光谱技术中常用相干探测器的最新进展和面临的挑战。我们的讨论强调了太赫兹光子学新发现的潜力，并突出了相干检测在激光与物质相互作用研究中的关键作用。
