09:45 〜 10:15
▲ [21a-221B-1] [INVITED] Development and application of sub-cycle mid-infrared source based on two-color filamentation
キーワード：ultrafast laser science, filamentation, mid-infrared
In this invited talk, the development and application of sub-cycle mid-infrared (MIR) pulses generated through a laser filament is summarized. The spectrum of the MIR pulse spreads from 2 to 50 µm, corresponding to multiple octaves, and the pulse duration is 6.9 fs, namely, 0.63 times the period of the carrier wavelength, 3.3 µm. The waveform of the sub-cycle pulse has been completely characterized with a newly developed method, frequency-resolved optical gating capable of carrier-envelope phase determination. The MIR supercontinuum has been applied to spectroscopy, such as ultrafast pump-probe spectroscopy and attenuated total reflection spectroscopy. High harmonic generation in solids using the light source has been also demonstrated.