richter_2013#

M. Richter, S. Patchkovskii, F. Morales, O. Smirnova and M. Ivanov, New J. Phys. 15, 083012 (2013)

Source record · Catalogue · Review register

Source kind: theory

Recorded technique: Analytical (dressed-state, Floquet) model of the Kerr response of an atom in a strong infrared field, and numerical TDSE for a 1D soft-core hydrogenic model and the 3D hydrogen atom (0.5-1.8 um, bell-shaped 4-0-4 and flat-top 4-40-4 cycle pulses) with varied simulation-box sizes to isolate the Kramers-Henneberger (KH) states.

Materials in structured entries: None recorded.

Dataset quantities: None recorded.

Contents: 0 datasets; 0 formulas.

Curation notes#

No datasets: the systems are a 1D model atom and atomic hydrogen (not curated species), and the results are figures of Re Delta alpha_w(F) = d_w(F)/F0 - lim d_w/F0 (the nonlinear part of the polarizability at the driving frequency) against intensity.

Higher-order Kerr claim (notes only): the saturation and reversal of the Kerr response is caused partly by ionisation and partly by population of, and restructuring into, the laser-dressed Kramers-Henneberger (‘bound states of a free electron’) states; with the KH states absorbed by a small box the linear Kerr effect persists until ionisation, as in Kolesik’s short-range-potential analysis (p. 8). In 3D hydrogen the response saturates near 4.3e13 W/cm^2 and reverses near 5.6e13 W/cm^2 (0.9 um, short pulse); for bell-shaped pulses ‘the saturation of the Kerr response happens just before ionization sets in. The higher-order Kerr effect appears to be real, but it is important only in a very narrow intensity window. As soon as ionization occurs, the free electrons start to dominate’ (Conclusions). Status: a mechanism study for hydrogen; it supports neither Loriot’s coefficients nor a perturbative n4 ... n10 series for real gases, and is consistent with the measured linear response up to ionisation (Wahlstrand et al. 2012, its ref. 39).

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets#

No datasets are recorded.

Formulas#

No formulas are recorded.

Corrections#

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.