- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Enhancement of THz Generation by Two-Color TW Laser Pulses in a Low-Pressure Gas
摘要： We identify experimental conditions for efficient generation of THz pulses by high power near IR laser radiation: 2 TW, 30 fs, 800-nm laser pulses with their second harmonic were slightly focused in a low-pressure gas cell in such a way to avoid multiple filamentation and excessive ionization. This two-color scheme yields a microjoule level of THz pulses which is two orders of magnitude higher than the signal generated in the atmosphere of ambient air.
关键词： THz,Two-color,Plasma absorption,Terawatt,Chirp,Filament,Low pressure,Saturation
更新于2025-09-23 15:21:01
-
[IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Generation of MV/cm longitudinal terahertz electric fields from relativistic laser-solid interactions
摘要： We report on the generation and detection of longitudinal terahertz (THz) transient, with field strength of 1.5 MV/cm [1], at the focus of a radially polarized high-power terahertz beam generated at the rear surface of a thin metal foil irradiated by multi-terawatt laser pulse [2]. An f/1.5 off-axis parabolic mirror was used to focus the collimated THz beam. In addition to the longitudinal field, a transverse field, albeit off-axis, with amplitude in excess of 3 MV/cm was also measured.
关键词： multi-terawatt laser pulse,field strength,high-power terahertz beam,off-axis parabolic mirror,longitudinal terahertz
更新于2025-09-16 10:30:52