dorsal/arxiv
View SchemaTwo-color stabilization of atomic hydrogen in circularly polarized laser fields
| Authors | D. Bauer, F. Ceccherini |
|---|---|
| Categories | |
| ArXiv ID | physics/0208073 |
| URL | https://arxiv.org/abs/physics/0208073 |
| DOI | 10.1103/PhysRevA.66.053411 |
Abstract
Dynamic stabilization of atomic hydrogen against ionization in high-frequency single- and two-color, circularly polarized laser pulses is observed by numerically solving the three-dimensional, time-dependent Schr\"odinger equation. The single-color case is revisited and numerically determined ionization rates are compared with both, exact and approximate high-frequency Floquet rates. The position of the peaks in the photoelectron spectra can be explained with the help of dressed initial states. In two-color laser fields of opposite circular polarization the stabilized probability density may be shaped in various ways. For laser frequencies $\omega_1$ and $\omega_2=n\omega_1$, $n=2,3,...$ and sufficiently large excursion amplitudes $n+1$ distinct probability density peaks are observed. This may be viewed as the generalization of the well-known ``dichotomy'' in linearly polarized laser fields, i.e, as ``trichotomy,'' ``quatrochotomy,'' ``pentachotomy'' etc. All those observed structures and their ``hula-hoop''-like dynamics can be understood with the help of high-frequency Floquet theory and the two-color Kramers-Henneberger transformation. The shaping of the probability density in the stabilization regime can be realized without additional loss in the survival probability, as compared to the corresponding single-color results.
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"abstract": "Dynamic stabilization of atomic hydrogen against ionization in high-frequency\nsingle- and two-color, circularly polarized laser pulses is observed by\nnumerically solving the three-dimensional, time-dependent Schr\\\"odinger\nequation. The single-color case is revisited and numerically determined\nionization rates are compared with both, exact and approximate high-frequency\nFloquet rates. The position of the peaks in the photoelectron spectra can be\nexplained with the help of dressed initial states. In two-color laser fields of\nopposite circular polarization the stabilized probability density may be shaped\nin various ways. For laser frequencies $\\omega_1$ and $\\omega_2=n\\omega_1$,\n$n=2,3,...$ and sufficiently large excursion amplitudes $n+1$ distinct\nprobability density peaks are observed. This may be viewed as the\ngeneralization of the well-known ``dichotomy\u0027\u0027 in linearly polarized laser\nfields, i.e, as ``trichotomy,\u0027\u0027 ``quatrochotomy,\u0027\u0027 ``pentachotomy\u0027\u0027 etc. All\nthose observed structures and their ``hula-hoop\u0027\u0027-like dynamics can be\nunderstood with the help of high-frequency Floquet theory and the two-color\nKramers-Henneberger transformation. The shaping of the probability density in\nthe stabilization regime can be realized without additional loss in the\nsurvival probability, as compared to the corresponding single-color results.",
"arxiv_id": "physics/0208073",
"authors": [
"D. Bauer",
"F. Ceccherini"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.66.053411",
"title": "Two-color stabilization of atomic hydrogen in circularly polarized laser fields",
"url": "https://arxiv.org/abs/physics/0208073"
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