基于铌酸锂平板波导的切伦科夫型太赫兹辐射源的研究
Research on Cherenkov-Type Terahertz Radiation Source Based on Lithium Niobate Slab Waveguide
DOI: 10.12677/japc.2025.142042, PDF,   
作者: 吕跃凯, 袁英豪：上海理工大学光电信息与计算机工程学院，上海
关键词: 太赫兹；切伦科夫辐射；铌酸锂波导；Terahertz； Cherenkov Radiation； Lithium Niobate Waveguide
摘要: 研制了一种基于铌酸锂平板波导结构的切伦科夫辐射型太赫兹辐射源。采用一套由光纤准直镜、平凸聚焦镜和圆柱状棒镜等组成的飞秒激光光束压缩光学系统，成功地将光纤输出的中心波长为1550 nm、重复频率为100 MHz、脉冲宽度为85 fs的飞秒激光脉冲，耦合进入厚度仅有10 μm的掺杂5% MgO:LiNbO3的波导层，获得了6.52 nW的太赫兹波辐射功率。
Abstract: A terahertz (THz) radiation source based on a lithium niobate (LiNbO3) slab waveguide structure utilizing Cherenkov radiation has been developed. By employing a femtosecond laser beam compression optical system composed of a fiber collimator, plano-convex focusing lens, and cylindrical rod lens, the research team successfully coupled femtosecond laser pulses—with a central wavelength of 1550 nm, repetition rate of 100 MHz, and pulse width of 85 fs—output from an optical fiber into a 10-μm-thick waveguide layer of 5% MgO-doped LiNbO3. This achieved a THz radiation power output of 6.52 nW.
文章引用：吕跃凯, 袁英豪. 基于铌酸锂平板波导的切伦科夫型太赫兹辐射源的研究[J]. 物理化学进展, 2025, 14(2): 451-459. https://doi.org/10.12677/japc.2025.142042

参考文献

[1] Ferguson, B. and Zhang, X. (2002) Materials for Terahertz Science and Technology. Nature Materials, 1, 26-33. [Google Scholar] [CrossRef] [PubMed]
[2] Zheng, Z., Fan, W., Li, H. and Tang, J. (2014) Terahertz Spectral Investigation of Anhydrous and Monohydrated Glucose Using Terahertz Spectroscopy and Solid-State Theory. Journal of Molecular Spectroscopy, 296, 9-13. [Google Scholar] [CrossRef] 
[3] Murakami, H., Takarada, T. and Tonouchi, M. (2020) Low-Temperature Gaas-Based Plasmonic Photoconductive Terahertz Detector with Au Nano-Islands. Photonics Research, 8, 1448-1456. [Google Scholar] [CrossRef] 
[4] 江情男, 谭智勇, 万文坚, 等. 动态范围超过75 dB的InGaAs/InAlAs光电导太赫兹探测天线制备与表征[J/OL]. 红外与毫米波学报.
http://202.127.1.39/hwyhmb/hwyhmbcn/article/abstract/2024214, 2025-05-29.
[5] Xue, B., Fan, W., Liu, H.L., et al. (2008) THz Generation and Detection Based on the Technology of Ultra-Fast Femto-second Laser. Acta Photonica Sinica, 37, 1-5.
[6] Blanchard, F., Razzari, L., Bandulet, H.C., Sharma, G., Morandotti, R., Kieffer, J.C., et al. (2007) Generation of 1.5 μJ Single-Cycle Terahertz Pulses by Optical Rectification from a Large Aperture ZnTe Crystal. Optics Express, 15, 13212-13220. [Google Scholar] [CrossRef] [PubMed]
[7] Vodopyanov, K.L. (2006) Optical Generation of Narrow-Band Terahertz Packets in Periodically-Inverted Electro-Optic Crystals: Conversion Efficiency and Optimal Laser Pulse Format. Optics Express, 14, 2263-2276. [Google Scholar] [CrossRef] [PubMed]
[8] Hebling, J., Almasi, G., Kozma, I. and Kuhl, J. (2002) Velocity Matching by Pulse Front Tilting for Large Area THz-Pulse Generation. Optics Express, 10, 1161-1166. [Google Scholar] [CrossRef] [PubMed]
[9] Guiramand, L., Nkeck, J.E., Ropagnol, X., Ozaki, T. and Blanchard, F. (2022) Near-Optimal Intense and Powerful Terahertz Source by Optical Rectification in Lithium Niobate Crystal. Photonics Research, 10, 340-346. [Google Scholar] [CrossRef] 
[10] Wu, X., Kong, D., Hao, S., Zeng, Y., Yu, X., Zhang, B., et al. (2023) Generation of 13.9‐mj Terahertz Radiation from Lithium Niobate Materials. Advanced Materials, 35, Article ID: 2208947. [Google Scholar] [CrossRef] [PubMed]
[11] Takeya, K., Minami, T., Okano, H., Tripathi, S.R. and Kawase, K. (2017) Enhanced Cherenkov Phase Matching Terahertz Wave Generation via a Magnesium Oxide Doped Lithium Niobate Ridged Waveguide Crystal. APL Photonics, 2, Article ID: 016102. [Google Scholar] [CrossRef] 
[12] Suizu, K., Shibuya, T., Akiba, T., Tutui, T., Otani, C. and Kawase, K. (2008) Čherenkov Phase-Matched Monochromatic THz-Wave Generation Using Difference Frequency Generation with a Lithium Niobate Crystal. Optics Express, 16, 7493-7498. [Google Scholar] [CrossRef] [PubMed]
[13] Čerenkov, P.A. (1937) Visible Radiation Produced by Electrons Moving in a Medium with Velocities Exceeding That of Light. Physical Review, 52, 378-379. [Google Scholar] [CrossRef] 
[14] Auston, D.H. (1983) Subpicosecond Electro-Optic Shock Waves. Applied Physics Letters, 43, 713-715. [Google Scholar] [CrossRef] 
[15] Suizu, K., Shibuya, T., Uchida, H. and Kawase, K. (2010) Prism-Coupled Cherenkov Phase-Matched Terahertz Wave Generation Using a DAST Crystal. Optics Express, 18, 3338-3344. [Google Scholar] [CrossRef] [PubMed]
[16] Cao, H., Linke, R.A. and Nahata, A. (2004) Broadband Generation of Terahertz Radiation in a Waveguide. Optics Letters, 29, 1751-1753.