Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations

doi:10.1038/s42005-024-01893-2

	Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations
	Zhao, Jingjing 1,5; Zhang, Yizhu 4; Gao, Yanjun 1; Li, Meng2,3 ; Liu, Xiaokun2,3 ; Liu, Weimin2,3 ; Yan, Tian-Min 1; Jiang, Yuhai1,2,3
	2024-12-19
发表期刊	COMMUNICATIONS PHYSICS (IF:5.4[JCR-2023],5.7[5-Year])
ISSN	2399-3650
EISSN	2399-3650
卷号	7 期号:1
发表状态	已发表
DOI	10.1038/s42005-024-01893-2
摘要	Mixing the fundamental (omega) and the second harmonic (2 omega) waves in the gas phase is a widely employed technique for emitting terahertz (THz) pulses. The THz generation driven by bi-chromatic fields can be described by the photocurrent model, where the THz generation is attributed to free electrons ionized by the omega field, and the 2 omega field provides a perturbation to break the symmetry of the asymptotic momentum of free electrons. However, we find that the THz radiation is amplified by one order of magnitude when driven by bi-focal bi-chromatic fields, which cannot be explained only using the photocurrent model. Meanwhile, present measurements demonstrate that the THz radiation mainly originates from the plasma created by the 2 omega pulses instead of the omega pulses. Energy transfer from the 2 omega beam to the THz beam during the THz generation has been observed, validating the major contribution of the 2 omega beam. Furthermore, the THz bandwidth has been observed to extensively exceed the bandwidth of the pump pulse, not be explained by the photocurrent model as well. These counterintuitive results present a significant challenge for understanding strong-field nonlinear optics and simultaneously expanding various applications.
关键词	Electromagnetic wave emission Terahertz wave detectors Asymptotics Free electron Gas-phases Orders of magnitude Photocurrent modeling Second harmonics Tera Hertz Terahertz generation Terahertz pulse Terahertz radiation
URL	查看原文
收录类别	SCI ; EI
语种	英语
资助项目	the National Key Research and Development Program of China (No. 2022YFA1604302); the National Natural Science Foundation of China (No. 12334011)[2022YFA1604302] ; National Key Research and Development Program of China["12334011","12174284","12374262"]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:001380501000002
出版者	NATURE PORTFOLIO
EI入藏号	20245117564966
EI主题词	Nonlinear optics
EI分类号	711.1 Electromagnetic Waves in Different Media ; 741.1.1 Nonlinear Optics
原始文献类型	Journal article (JA)
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/372913
专题	物质科学与技术学院大科学中心_PI研究组_江玉海组物质科学与技术学院_PI研究组_刘伟民组物质科学与技术学院_硕士生物质科学与技术学院_博士生
通讯作者	Zhang, Yizhu; Jiang, Yuhai
作者单位	1.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China 2.ShanghaiTech Univ, Ctr Transformat Sci, Shanghai 201210, Peoples R China 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 4.Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者单位	上海科技大学; 物质科学与技术学院
推荐引用方式 GB/T 7714	Zhao, Jingjing,Zhang, Yizhu,Gao, Yanjun,et al. Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations[J]. COMMUNICATIONS PHYSICS,2024,7(1).
APA	Zhao, Jingjing.,Zhang, Yizhu.,Gao, Yanjun.,Li, Meng.,Liu, Xiaokun.,...&Jiang, Yuhai.(2024).Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations.COMMUNICATIONS PHYSICS,7(1).
MLA	Zhao, Jingjing,et al."Temporal-spatial manipulation of bi-focal bi-chromatic fields for terahertz radiations".COMMUNICATIONS PHYSICS 7.1(2024).