| Autor: |
Xu Sun, Zhi-Hui Lyu, Hai-Zhong Wu, Cong-Sen Meng, Dong-Wen Zhang, Zhi-Zhong Lu, Xiao-Wei Wang, Zeng-Xiu Zhao, Jian-Min Yuan |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Sensors, Vol 22, Iss 19, p 7569 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1424-8220 |
| DOI: |
10.3390/s22197569 |
| Popis: |
Using a controlled optical bias and balanced geometry, we propose a new scheme for broadband terahertz detection by laser-gas interaction without high-voltage manipulation. Compared to the conventional optical bias scheme, the common noise is reduced and the dynamic range as well as the signal-to-noise ratio are doubled. It provides a simple alternative for coherent broadband terahertz detection. The influence of optical bias on terahertz waveform is also investigated, and the evolution of the terahertz-induced second harmonic with probe delay is further revealed. This new detection scheme for broadband terahertz will boost the application of terahertz time-domain spectroscopy for its miniaturization and integrability. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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