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

M Clerici, D Faccio, L Caspani, M Peccianti, O Yaakobi, B E Schmidt, M Shalaby, F Vidal, F Légaré, T Ozaki, R Morandotti

Research output: Contribution to journalArticle

10 Citations (Scopus)
28 Downloads (Pure)

Abstract

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.

Original languageEnglish
Article number125011
Number of pages13
JournalNew Journal of Physics
Volume15
DOIs
Publication statusPublished - 9 Dec 2013

Keywords

  • characterization methods
  • difference-frequency generation
  • electric field oscillations
  • electric-field amplitude
  • long wavelength
  • measurements
  • short optical pulse
  • terahertz fields

Cite this