Two-Color-Driven Controllable Terahertz Generation in ITO Thin Film

被引：5
|
作者：
Lu, Yongchang [1 ,2 ,3 ]
Zhang, Xueqian [1 ,2 ,3 ]
Xu, Quan [1 ,2 ,3 ]
Jia, Wenhe [4 ]
Feng, Xi [1 ,2 ,3 ]
Chen, Xieyu [1 ,2 ,3 ,5 ]
Gu, Yangfan [1 ,2 ,3 ]
Yang, Yuanmu [4 ]
Zhang, Weili [6 ]
Han, Jiaguang [1 ,2 ,3 ,7 ]
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] Minist Educ, Key Lab Optoelect Informat & Technol, Tianjin 300072, Peoples R China
[4] Tsinghua Univ, Dept Precis Instrument, State Key Lab Precis Measurement Technol & Instrum, Beijing 100084, Peoples R China
[5] Res Ctr Intelligent Chips & Devices, Zhejiang Lab, Hangzhou 311121, Peoples R China
[6] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA
[7] Guilin Univ Elect Technol, Sch Optoelect Engn, Guangxi Key Lab Optoelect Informat Proc, Guilin 541004, Peoples R China
来源：
ACS PHOTONICS | 2024年 / 11卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Terahertz generation; indium tin oxide film; two-color interaction; amplitude and polarization modulation; four-wave mixing; INDIUM TIN OXIDE; LARGE OPTICAL NONLINEARITY; EMISSION; PULSES;
D O I：
10.1021/acsphotonics.3c01495
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Seeking new compact and controllable terahertz sources has garnered enormous interest across various disciplines. In our recent preliminary work, we have showcased the potential of an ultrathin indium tin oxide (ITO) film as an innovative platform for generating broadband terahertz waves. In this study, we conducted both experimental and theoretical investigations into a two-color femtosecond-laser-driven broadband terahertz generation in an ITO thin film. By adjusting the time delay and polarizations of the two driving pulses, we observed that the broadband terahertz waves exhibited nearly 100% amplitude modulation and 360(degrees) polarization angle tuning. To interpret the controllable processes, we employed a degenerated four-wave mixing (FWM) model. Our results indicated a correlation between the two-color interaction process and the second-order optical rectification process at the ITO film's surface, which either enhanced or suppressed the overall terahertz generation.
引用
收藏
页码：293 / 300
页数：8
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