| Theoretical research on terahertz wave generation from planar waveguide by optimized cascaded difference frequency generation |
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| 作者姓名： | 李忠洋 赵佳 刘文锴 胡青峰 李永军 焦彬哲 邴丕彬 张红涛 谭联 姚建铨 |
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| 作者单位： | College of Electric Power;College of Surveying and Geo-informatics;College of Precision Instrument and Opto-electronics Engineering |
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| 基金项目： | 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);Program for Science&Technology Innovation Talents in Universities of Henan Province,China(Grant No.18HASTIT023)。 |
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| 摘 要： | 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.
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| 关 键 词： | terahertz wave generation optimized cascaded difference frequency generation planar waveguide |
Theoretical research on terahertz wave generation from planar waveguide by optimized cascaded difference frequency generation |
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| Zhongyang Li,Jia Zhao,Wenkai Liu,Qingfeng Hu,Yongjun Li,Binzhe Jiao,Pibin Bing,Hongtao Zhang,Lian Tan,Jianquan Yao.Theoretical research on terahertz wave generation from planar waveguide by optimized cascaded difference frequency generation[J].Chinese Physics B,2021(2). |
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| Authors: | Zhongyang Li Jia Zhao Wenkai Liu Qingfeng Hu Yongjun Li Binzhe Jiao Pibin Bing Hongtao Zhang Lian Tan Jianquan Yao |
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| Institution: | (College of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;College of Surveying and Geo-informatics,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;College of Precision Instrument and Opto-electronics Engineering,Institute of Laser and Opto-electronics,Tianjin University,Tianjin 300072,China) |
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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. |
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