Chinese Optics Letters, 2020, 18 (2): 023202, Published Online: Feb. 18, 2020   

Terahertz wave emission from water lines Download: 723次

Author Affiliations
1 Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
2 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
3 Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, and Beijing Advanced Innovation Center for Imaging Technology, Department of Physics, Capital Normal University, Beijing 100048, China
Abstract
To make further understanding of terahertz (THz) wave generation from liquid water, we study THz wave emission from water lines of different diameters. The water line with a smaller diameter generates a stronger THz electric field for the diameters from 0.2 mm to 0.5 mm. The THz electric field strength and polarity change with the relative position between the incident laser and water line. Moreover, the THz energy has an optimal radiation angle of about 60°. A two-dimensional dipole array model is introduced to illustrate the phenomenon. Our observations contribute to optimizing the scheme of the liquid THz source.

Shijia Feng, Liquan Dong, Tong Wu, Yong Tan, Rui Zhang, Liangliang Zhang, Cunlin Zhang, Yuejin Zhao. Terahertz wave emission from water lines[J]. Chinese Optics Letters, 2020, 18(2): 023202.

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