Nonlinear Terahertz Generation: Chiral and Achiral Meta-Atom Coupling

被引:31
作者
Wang, Qingwei [1 ,2 ,3 ]
Zhang, Xueqian [1 ,2 ,3 ]
Xu, Quan [1 ,2 ,3 ]
Feng, Xi [1 ,2 ,3 ]
Lu, Yongchang [1 ,2 ,3 ]
Niu, Li [1 ,2 ,3 ]
Chen, Xieyu [1 ,2 ,3 ]
Plum, Eric [4 ,5 ]
Gu, Jianqiang [1 ,2 ,3 ]
Yang, Quanlong [6 ]
Fang, Ming [7 ]
Huang, Zhixiang [7 ]
Zhang, Shuang [8 ]
Han, Jiaguang [1 ,2 ,3 ,9 ]
Zhang, Weili [10 ]
机构
[1] Tianjin Univ, Ctr Terahertz Waves, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Key Lab Optoelect Informat & Technol, Tianjin 300072, Peoples R China
[4] Univ Southampton, Optoelect Res Ctr, Southampton SO17, England
[5] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, England
[6] Cent South Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China
[7] Anhui Univ, Key Lab Intelligent Comp & Signal Proc, Minist Educ, Hefei 230039, Peoples R China
[8] Univ Hong Kong, Fac Sci, Dept Phys, Hong Kong 999077, Peoples R China
[9] Guilin Univ Elect Technol, Sch Optoelect Engn, Guangxi Key Lab Optoelect Informat Proc, Guilin 541004, Peoples R China
[10] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA
基金
中国国家自然科学基金; 英国工程与自然科学研究理事会; 欧盟地平线“2020”; 欧洲研究理事会;
关键词
amplitude tuning; broadband terahertz generation; coupling; nonlinear circular dichroism; nonlinear metasurfaces; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; METASURFACES; PHASE; EMITTERS; ANALOG; BEAMS;
D O I
10.1002/adfm.202300639
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Generation and manipulation of terahertz (THz) waves are of vital importance for advancing THz technology. Nonlinear metasurfaces allow effective integration of both processes into a single compact device. However, such existing THz devices commonly rely on utilizing a single meta-atom, which has fixed THz generation properties and thus limits the range of achievable functionalities. Here, it is demonstrate how coupling between different meta-atoms within the unit-cell can be used as a degree of freedom for controlling nonlinear THz generation, where achiral coupling provides full control over the amplitude of the generated THz field, while chiral coupling makes the THz generation sensitive to the handedness of the pump polarization. In particular, chiral coupling allows the realization of multiplexed pump-handedness-selective nonlinear metasurfaces, which is illustrated experimentally by selectively generating THz beams with different orbital angular momentum with a single nonlinear metasurface. This approach provides opportunities for developing various integrated nonlinear THz devices.
引用
收藏
页数:11
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