KMS Chongqing Institute of Green and Intelligent Technology, CAS
A coherent detection technique via optically biased field for broadband terahertz radiation | |
Du, Hai-Wei; Dong, Jia-Meng; Liu, Yi; Shi, Chang-Cheng; Wu, Jing-Wei; Peng, Xiao-Yu | |
2017-09-01 | |
摘要 | We demonstrate theoretically and experimentally a coherent terahertz detection technique based on an optically biased field functioning as a local oscillator and a second harmonic induced by the terahertz electric field in the air sensor working in free space. After optimizing the polarization angle and the energy of the probe pulse, and filling the system with dry nitrogen, the terahertz radiation generated from a two-color-femtosecond-laser-pulses induced plasma filament is measured by this technique with a bandwidth of 0.1-10 THz and a signal-to-noise ratio of 48 dB. Our technique provides an alternative simple method for coherent broadband terahertz detection. Published by AIP Publishing. |
DOI | 10.1063/1.5002570 |
发表期刊 | REVIEW OF SCIENTIFIC INSTRUMENTS |
ISSN | 0034-6748 |
卷号 | 88期号:9页码:5 |
收录类别 | SCI |
WOS记录号 | WOS:000412108700005 |
语种 | 英语 |