title: Simultaneous generation of sub-5-femtosecond 400  nm and 800  nm pulses for attosecond extreme ultraviolet pump-probe spectroscopy.
abstract: Few-cycle laser pulses with wavelengths centered at 400 nm and 800 nm are simultaneously obtained through wavelength separation of ultrashort, spectrally broadened Vis-NIR laser pulses spanning 350-1100 nm wavelengths. The 400 nm and 800 nm pulses are separately compressed, yielding pulses with 4.4 fs and 3.8 fs duration, respectively. The pulse energy exceeds 5 μJ for the 400 nm pulses and 750 μJ for the 800 nm pulses. Intense 400 nm few-cycle pulses have a broad range of applications in nonlinear optical spectroscopy, which include the study of photochemical dynamics, semiconductors, and photovoltaic materials on few-femtosecond to attosecond time scales. The ultrashort 400 nm few-cycle pulses generated here not only extend the spectral range of the optical pulse for NIR-XUV attosecond pump-probe spectroscopy but also pave the way for two-color, three-pulse, multidimensional optical-XUV spectroscopy experiments.
authors.forename: Hung-Tzu
authors.initials: HT
authors.lastname: Chang
authors.forename: Michael
authors.initials: M
authors.lastname: Zürch
authors.forename: Peter M
authors.initials: PM
authors.lastname: Kraus
authors.forename: Lauren J
authors.initials: LJ
authors.lastname: Borja
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Leone