Hai-Wei DU, Jing-Yi WANG, Chang-Ming SUN, Qiang-Shuang LI. From terahertz to mid-infrared ultra-broadband radiation generated from few-cycle laser pulse interaction with gas plasma filament[J]. Journal of Infrared and Millimeter Waves, 2023, 42(6): 788
- Journal of Infrared and Millimeter Waves
- Vol. 42, Issue 6, 788 (2023)
Fig. 1. The Keldysh parameter (a) and the ionization rate (b) with different laser intensities
Fig. 2. Two few-cycle laser pulses with durations of 9 fs (a) and 5 fs (b), respectively, with several different phases
Fig. 3. The ionization rate induced by the few-cycle laser pulses with different phases
Fig. 4. The plasma density produced by the few-cycle laser pulses with different phases
Fig. 5. Plasma currents produced by the few-cycle laser pulses with different phases
Fig. 6. The ultra-broadband radiation in the terahertz to mid-infrared range generated by the plasma current, (a) the time waveform, (b) its frequency spectrum
Fig. 7. The phase evolution of electromagnetic pulse depending on the phase of few-cycle laser pulses, (a) the pulse waveforms, (b) the frequency spectra
Fig. 8. The amplitude of electromagnetic pulse as a function of the phase of the few-cycle laser pulse
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