High-harmonic generation spectroscopy is a powerful tool for ultrafast spectroscopy with intrinsic attosecond time resolution. Its major limitation—the fact that a strong infrared driving pulse is governing the entire generation process—is lifted by extreme ultraviolet (XUV)-initiated high-harmonic generation (HHG). Tunneling ionization is replaced by XUV photoionization, which decouples ionization from recollision. Here we probe the intensity dependence of XUV-initiated HHG and observe strong spectral frequency shifts of the high harmonics. We are able to tune the shift by controlling the instantaneous intensity of the infrared field. We directly access the reciprocal intensity parameter associated with the electron trajectories and identi...
The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosec...
The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field o...
High-harmonic generation (HHG) is a non-linear optical process that can convert laser light with sta...
Attosecond pulses in the extreme ultraviolet (XUV) spectral range are today routinely generated via ...
Advancements in spectroscopy rely on the improvement of two fundamental characteristics: spatial and...
The generation of intense, femtosecond-duration laser pulses using near-IR to IR wavelengths of ligh...
We theoretically demonstrate the generation of wavelength-tunable, narrow-bandwidth extreme-ultravio...
The extreme ultraviolet (XUV) pulse effect on the ionization and recombination of the high-order har...
Using the analytic time-dependent effective range theory, we study two-color high-order harmonic gen...
We present a study of high-order-harmonic generation (HHG) assisted by extreme ultraviolet (XUV) att...
In the past three decades, high-order harmonic generation (HHG) has attracted much attention due to ...
Electronic dynamics in molecules and atoms takes place on the attosecond timescale. For the observat...
Intense extreme-ultraviolet (XUV) pulses enable the investigation of XUV-induced non-linear processe...
Extreme ultraviolet (XUV) spectroscopy is an inner shell technique that probes the M$_{2,3}$-edge ex...
\newcommand{\midtilde}{\raisebox{-0.25\baselineskip}{\textasciitilde}} Extreme ultraviolet (XUV) spe...
The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosec...
The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field o...
High-harmonic generation (HHG) is a non-linear optical process that can convert laser light with sta...
Attosecond pulses in the extreme ultraviolet (XUV) spectral range are today routinely generated via ...
Advancements in spectroscopy rely on the improvement of two fundamental characteristics: spatial and...
The generation of intense, femtosecond-duration laser pulses using near-IR to IR wavelengths of ligh...
We theoretically demonstrate the generation of wavelength-tunable, narrow-bandwidth extreme-ultravio...
The extreme ultraviolet (XUV) pulse effect on the ionization and recombination of the high-order har...
Using the analytic time-dependent effective range theory, we study two-color high-order harmonic gen...
We present a study of high-order-harmonic generation (HHG) assisted by extreme ultraviolet (XUV) att...
In the past three decades, high-order harmonic generation (HHG) has attracted much attention due to ...
Electronic dynamics in molecules and atoms takes place on the attosecond timescale. For the observat...
Intense extreme-ultraviolet (XUV) pulses enable the investigation of XUV-induced non-linear processe...
Extreme ultraviolet (XUV) spectroscopy is an inner shell technique that probes the M$_{2,3}$-edge ex...
\newcommand{\midtilde}{\raisebox{-0.25\baselineskip}{\textasciitilde}} Extreme ultraviolet (XUV) spe...
The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosec...
The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field o...
High-harmonic generation (HHG) is a non-linear optical process that can convert laser light with sta...