title: Phase-modulated harmonic light spectroscopy.
abstract: By combining phase-modulated nonlinear spectroscopy with second harmonic generation, the concept of phase-modulated harmonic light spectroscopy is introduced. Simultaneous spectroscopy with different harmonics of the light is demonstrated and linear and nonlinear excitation of the spectroscopic sample is investigated. Sum frequency generation and stray light effects during temporal pulse overlap have been evaluated in detail, accompanied by simulations. The presented work provides a promising concept to facilitate coherent nonlinear time-domain spectroscopy in the extreme ultraviolet wavelength regime and contributes valuable insights for future studies in this direction.
authors.forename: Lukas
authors.initials: L
authors.lastname: Bruder
authors.forename: Ulrich
authors.initials: U
authors.lastname: Bangert
authors.forename: Frank
authors.initials: F
authors.lastname: Stienkemeier