中国物理B ›› 2021, Vol. 30 ›› Issue (2): 24209-0.doi: 10.1088/1674-1056/abc3b7

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  • 收稿日期:2020-08-15 修回日期:2020-09-14 接受日期:2020-10-22 出版日期:2021-01-18 发布日期:2021-01-18

Theoretical research on terahertz wave generation from planar waveguide by optimized cascaded difference frequency generation

Zhongyang Li(李忠洋)1,†, Jia Zhao(赵佳)1, Wenkai Liu(刘文锴)2, Qingfeng Hu(胡青峰)2, Yongjun Li(李永军)1, Binzhe Jiao(焦彬哲)1, Pibin Bing(邴丕彬)1, Hongtao Zhang(张红涛)1, Lian Tan(谭联)1, and Jianquan Yao(姚建铨)3   

  1. 1 College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 2 College of Surveying and Geo-informatics, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 3 College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China
  • Received:2020-08-15 Revised:2020-09-14 Accepted:2020-10-22 Online:2021-01-18 Published:2021-01-18
  • Contact: †Corresponding author. E-mail: thzwave@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61735010, 31671580, and 61601183), Natural Science Foundation of Henan Province, China (Grant No. 162300410190), and Program for Science & Technology Innovation Talents in Universities of Henan Province, China (Grant No. 18HASTIT023).

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Abstract: A novel scheme for high-efficiency terahertz (THz) wave generation based on optimized cascaded difference frequency generation (OCDFG) with planar waveguide is presented. The phase mismatches of each-order cascaded difference frequency generation (CDFG) are modulated by changing the thickness of the waveguide, resulting in a decrement of phase mismatches in cascaded Stokes processes and an increment of phase mismatches in cascaded anti-Stokes processes simultaneously. The modulated phase mismatches enhance the cascaded Stokes processes and suppress the cascaded anti-Stokes processes simultaneously, yielding energy conversion efficiencies over 25% from optical wave to THz wave at 100 K.

Key words: terahertz wave generation, optimized cascaded difference frequency generation, planar waveguide

中图分类号:  (Optical parametric oscillators and amplifiers)

  • 42.65.Yj
42.65.Dr (Stimulated Raman scattering; CARS) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)