Abstract

High-quality ultrashort mid-IR pulses are highly demanded in time-resolved spectroscopy with equal significance in molecular spectroscopy (molecular fingerprint region: 3um-30um) and strong-field physics. Applied fields are biochemical research and medical diagnostics, femto chemistry, high-harmonic generation, electron-diffraction imaging [1], etc. A high-energy mid-infrared pulse can specifically target the excitation of interest at the required photon energy reducing the unwanted relaxation processes; however, a short pulse duration is needed to reach the high temporal resolution. In this work, we present the time-frequency analysis of field-resolved measurements. The measured electric field contains all relevant information for constructive and destructive interference from an exponentially decaying single Lorentzian oscillator mode (dark wave).

© 2023 IEEE