Oscillation effect in frequency domain current from a photoconductive antenna via double-probe-pulse terahertz detection technique
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- 作者：Qi Jin ; Jinsong Liu ; Kejia Wang ; Zhengang Yang…
- 关键词：terahertz (THz) ; photoconductivity ; frequency oscillation
- 刊名：Frontiers of Optoelectronics in China
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：8
- 期：1
- 页码：104-109
- 全文大小：835 KB
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12. Zhang X, Xu J. Introduction to THz Wave Photonics. New York: Springer, 2010, Chap. 2 CrossRef - 作者单位：Qi Jin (1)
Jinsong Liu (1)
Kejia Wang (1)
Zhengang Yang (1)
Shenglie Wang (1)
Kefei Ye (1)
1. Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China - 刊物类别：Engineering
- 刊物主题：Electronic and Computer Engineering
Electromagnetism, Optics and Lasers
Biomedical Engineering
Chinese Library of Science - 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
- ISSN：2095-2767
文摘
Via constructing a special terahertz time domain spectroscopy (THz-TDS) system in which two femtosecond (fs) laser pulses were used as probe pulses to excite a photoconductive (PC) THz detector, the time behavior of the current from the detector was measured. The corresponding theoretical analysis was performed by a well-known equivalent-circuit model. When the time domain current was transformed to frequency domain, an oscillation effect was observed. The oscillation frequency was decided by the time delay between the two probe pulses. The number of the extrema in the frequency domain current curve was proportion to the pulse interval in 0.1- THz. A method to measure the interval of fs laser pulses was proposed. It is important for applications of fs laser pulses or train.