Author Affiliations
1 Terahertz Technology Innovation Research Institute, Terahertz Spectrum and Imaging Technology Cooperative Innovation Center, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
2 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 Tera Aurora Electro-optics Technology Co., Ltd., Shanghai 200093, China
4 Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China
This work presents a brief review of our recent research on an antiresonant mechanism named core antiresonant reflection (CARR), which leads to a broadband terahertz (THz) spectrum output with periodic dips at resonant frequencies after its transmission along a hollow-core tubular structure (e.g., a paper tube). The CARR theory relies only on parameters of the tube core (e.g., the inner diameter) rather than the cladding, thus being distinct from existing principles such as the traditional antiresonant reflection inside optical waveguides (ARROWs). We demonstrate that diverse tubular structures, including cylindrical, polyhedral, spiral, meshy, and notched hollow tubes with either transparent or opaque cladding materials, as well as a thick-walled hole, could indeed become CARR-type resonators. Based on this CARR effect, we also perform various applications, such as pressure sensing with paper-folded THz cavities, force/magnetism-driven chiral polarization modulations, and single-pulse measurements of the angular dispersion of THz beams. In future studies, the proposed CARR method promises to support breakthroughs in multiple fields by means of being extended to more kinds of tubular entities for enhancing their interactions with light waves in an antiresonance manner.
antiresonance core cladding tubular structure application 
Chinese Optics Letters
2023, 21(11): 110005
1 上海理工大学太赫兹技术创新研究院,上海 200093
2 南开大学现代光学研究所,天津 300350
3 天津大学精密仪器与光电子工程学院,天津 300072


物理光学 太赫兹波 飞秒激光成丝 空间束缚 物理机制 超分辨成像 physical optics terahertz wave femtosecond laser filamentation spatial confinement physical mechanism super-resolution imaging 
2023, 50(17): 1714010

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