Strong Field Approximation and High Harmonic Generation

The sensitivities of high-harmonic generation and strong-field ionization to coupled electronic and nuclear dynamics.

The sensitivities of high-harmonic generation (HHG) and strong-field ionization (SFI) to coupled electronic and nuclear dynamics are studied, using the nitric oxide (NO) molecule as an example. A coherent superposition of electronic and rotational states of NO is prepared by impulsive stimulated Raman scattering and probed by simultaneous detection of HHG and SFI yields. We observe a fourfold h...

Strong-field ionization and high-order-harmonic generation during polyatomic molecular dynamics of N2O4

Michael Spanner,1 Jochen Mikosch,1 Andrey E. Boguslavskiy,1 Margaret M. Murnane,2 Albert Stolow,1 and Serguei Patchkovskii1 1Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6 2JILA and Department of Physics, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA (Received 2 Septemb...

Quantum optical signatures in strong-field laser physics: Infrared photon counting in high-order-harmonic generation

We analytically describe the strong-field light-electron interaction using a quantized coherent laser state with arbitrary photon number. We obtain a light-electron wave function which is a closed-form solution of the time-dependent Schrödinger equation (TDSE). This wave function provides information about the quantum optical features of the interaction not accessible by semi-classical theories...

Strong-field perspective on high-harmonic radiation from bulk solids.

Mechanisms of high-harmonic generation from crystals are described by treating the electric field of a laser as a quasistatic strong field. Under the quasistatic electric field, electrons in periodic potentials form dressed states, known as Wannier-Stark states. The energy differences between the dressed states determine the frequencies of the radiation. The radiation yield is determined by the...

Static-electric-field effects on high harmonic generation.