期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.235002
关键词
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资金
- Department of Homeland Security through the DHS-ALERT Center [2008-ST-061-ED0001]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0852728] Funding Source: National Science Foundation
We report the study of femtosecond laser-induced air plasma fluorescence under the illumination of terahertz (THz) pulses. Semiclassical modeling and experimental verification indicate that time-resolved THz radiation-enhanced emission of fluorescence is dominated by the electron kinetics and the electron-impact excitation of gas molecules or ions. We demonstrate that the temporal waveform of the THz field could be retrieved from the transient enhanced fluorescence, making omnidirectional, coherent detection available for THz time-domain spectroscopy.
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