Philipp Wustelt
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View article: Experimental study of the laser-induced ionization of heavy metal and metalloid ions: Au<sup>+</sup> and Si<sup>2+</sup> in intense and sculpted femtosecond laser fields
Experimental study of the laser-induced ionization of heavy metal and metalloid ions: Au<sup>+</sup> and Si<sup>2+</sup> in intense and sculpted femtosecond laser fields Open
We implement a liquid metal ion source in a 3D coincidence momentum spectroscopy setup for studying the interaction of ionic targets with intense laser pulses. Laser intensities of up to 4 ⋅ 1016 W cm−2 allow for the observation of up to t…
View article: Laser-Driven Anharmonic Oscillator: Ground-State Dissociation of the Helium Hydride Molecular Ion by Midinfrared Pulses
Laser-Driven Anharmonic Oscillator: Ground-State Dissociation of the Helium Hydride Molecular Ion by Midinfrared Pulses Open
The vibrational motion of molecules represents a fundamental example of an anharmonic oscillator. Using a prototype molecular system, HeH+, we demonstrate that appropriate laser pulses make it possible to drive the nuclear motion in the an…
View article: High-Order Phase-Dependent Asymmetry in the Above-Threshold Ionization Plateau
High-Order Phase-Dependent Asymmetry in the Above-Threshold Ionization Plateau Open
Above-threshold ionization spectra from cesium are measured as a function of the carrier-envelope phase (CEP) using laser pulses centered at 3.1 μm wavelength. The directional asymmetry in the energy spectra of backscattered electrons osci…
View article: Dissociation and ionization of HeH<sup>+</sup> in sub-cycle-controlled intense two-color fields
Dissociation and ionization of HeH<sup>+</sup> in sub-cycle-controlled intense two-color fields Open
Using quantum-mechanical, one-dimensional, non-Born–Oppenheimer simulations we study the control over the strong-field dynamics of the helium hydride molecular ion HeH + due to interaction driven by short and strong two-color laser pulses.…
View article: Carrier-envelope-phase measurement of few-cycle mid-infrared laser pulses using high harmonic generation in ZnO
Carrier-envelope-phase measurement of few-cycle mid-infrared laser pulses using high harmonic generation in ZnO Open
High-harmonic generation (HHG) in crystals offers a simple, affordable and easily accessible route to carrier-envelope phase (CEP) measurements, which scales favorably towards longer wavelengths. We present measurements of HHG in ZnO using…
View article: Goldilocks Zone for Enhanced Ionization in Strong Laser Fields
Goldilocks Zone for Enhanced Ionization in Strong Laser Fields Open
Utilizing a benchmark measurement of laser-induced ionization of an H$_2^+$ molecular ion beam target at infrared wavelength around 2 $μ$m, we show that the characteristic two-peak structure predicted for laser-induced enhanced ionization …
View article: Strong-field polarizability-enhanced dissociative ionization
Strong-field polarizability-enhanced dissociative ionization Open
We investigate dissociative single and double ionization of HeH+ induced by\nintense femtosecond laser pulses. By employing a semi-classical model with\nnuclear trajectories moving on field-dressed surfaces and ionization events\ntreated a…
View article: The heteronuclear limit of strong-field ionization: HeH$^+$
The heteronuclear limit of strong-field ionization: HeH$^+$ Open
A sophisticated setup for measuring laser-induced fragmentation of an ion beam of helium hydride and an isotopologue at various wavelengths and intensities enables us to study the dynamics of this most fundamental polar molecule. In contra…
View article: Numerical investigation of the sequential-double-ionization dynamics of helium in different few-cycle-laser-field shapes
Numerical investigation of the sequential-double-ionization dynamics of helium in different few-cycle-laser-field shapes Open
We investigate sequential double ionization of helium by intense near-circularly polarized few-cycle laser pulses using a semiclassical ionization model with two independent electrons. Simulated ${\mathrm{He}}^{2+}$ ion momentum distributi…
View article: Momentum-resolved study of the saturation intensity in multiple ionization
Momentum-resolved study of the saturation intensity in multiple ionization Open
We present a momentum-resolved study of strong field multiple ionization of\nionic targets. Using a deconvolution method we are able to reconstruct the\nelectron momenta from the ion momentum distributions after multiple ionization\nup to …