Phase-Matching of High-Order Harmonics Driven by Mid- Infrared Light

Abstract

We demonstrate that phase-matched frequency upconversion of ultrafast laser light can be extended to shorter wavelengths by using longer driving laser wavelengths. Experimentally, we show that the phase-matching cutoff for harmonic generation in argon increases from 45 to 100 eV when the driving laser wavelength is increased from 0.8 to 1.3 micrometers. Phase matching is also obtained at higher pressures using a longer-wavelength driving laser, mitigating the unfavorable scaling of the single-atom response. Theoretical calculations suggest that phase-matched high harmonic frequency upconversion driven by mid-infrared pulses could be extended to extremely high photon energies.

10 pages, 3 figures

References in corpus (2)

• Phase-Matched Generation of Coherent Soft-X-Rays
• Phase Matching of High-Order Harmonics in Hollow Waveguides

Cited by in corpus (5)

• Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum
• Medium propagation effects in high harmonic generation of Ar and N${}_2$
• Table-top high-energy 7 um OPCPA and 260 mJ Ho:YLF pump laser
• Strong laser physics, non-classical light states and quantum information science
• Introduction to attosecond time-delays in photoionization