The envelope Hamiltonian for electron interaction with ultrashort pulses

Abstract

For ultrashort VUV pulses with a pulse length comparable to the orbital time of the bound electrons they couple to we propose a simplified envelope Hamiltonian. It is based on the Kramers-Henneberger representation in connection with a Floquet expansion of the strong-field dynamics but keeps the time dependence of the pulse envelope explicit. Thereby, the envelope Hamiltonian captures the essence of the physics, -- light-induced shifts of bound states, single-photon absorption, and non-adiabatic electronic transitions. It delivers quantitatively accurate ionization dynamics and allows for physical insight into the processes occurring. Its minimal requirements for construction in terms of laser parameters make it ideally suited for a large class of atomic and molecular problems.

5 pages, 3 figures

References in corpus (7)

• Electron-energy bunching in laser-driven soft recollisions
• Dynamic interference of photoelectrons produced by high-frequency laser pulses
• Exact Nondipole Kramers-Henneberger Form of the Light-Atom Hamiltonian: An Application to Atomic Stabilization and Photoelectron Energy Spectra
• Low-energy peak structure in strong-field ionization by mid-infrared laser-pulses: two-dimensional focusing by the atomic potential
• Strong Orientation Effects in Ionization of H${}_2^{+}$ by Short, Intense, High-Frequency Light Sources
• Energy bunching in soft recollisions revealed with long-wavelength few-cycle pulses
• Dissociative ionization of H2+ using intense femtosecond XUV laser pulses

Cited by in corpus (9)

• Nondipole effects in atomic dynamic interference
• Electron dynamics driven by light pulse derivatives
• Laser-controlled real- and reciprocal-space topology in multiferroic insulators
• Non-adiabatic molecular association in thermal gases driven by radio-frequency pulses
• Spatio-temporal interference of photo electron wave packets and time scale of non-adiabatic transition in high-frequency regime
• Non-adiabatic ionization with tailored laser pulses
• Observation of coherent oscillations in association of dimers from a thermal gas of ultracold atoms
• Electric field dissociation of weakly bound molecular ions
• Floquet approach for dynamics in short and intense laser pulses