Spectrally resolved wave-mixing between near- and far-infrared pulses in gas

Clerici, M and Faccio, D and Caspani, L and Peccianti, M and Yaakobi, O and Schmidt, B E and Shalaby, M and Vidal, F and Légaré, F and Ozaki, T and Morandotti, R (2013) Spectrally resolved wave-mixing between near- and far-infrared pulses in gas. New Journal of Physics, 15. 125011. ISSN 1367-2630

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    We investigate the nonlinear wave-mixing in gases between intense, short optical pulses and long-wavelength fields (mid infrared and terahertz). We show numerically that the beating between the sum- and difference-frequency generation components can be isolated in the spectrogram of the interaction, and can be used to sample the electric field oscillations of the long-wavelength pulses. This, in turn, could be employed as a possible characterization method that provides information on the real electric field amplitude. Our numerical model is supported by spectrally resolved measurements of the four-wave mixing signals obtained from the interaction of intense, single-cycle terahertz fields (λ > 15 μm) and optical pulses (λ ≃ 800 nm, 50 fs duration) in air.

    ORCID iDs

    Clerici, M, Faccio, D, Caspani, L ORCID logoORCID: https://orcid.org/0000-0003-2711-0448, Peccianti, M, Yaakobi, O, Schmidt, B E, Shalaby, M, Vidal, F, Légaré, F, Ozaki, T and Morandotti, R;