Semiclassical study of the ionization spectra of Rydberg atoms driven by intense half-cycle pulses

Mallalieu, Mark; Chu, Shih‐I

doi:10.1016/0009-2614(96)00648-3

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…These characteristic features give rise to interesting novel phenomena which have been explored in a number of recent investigations. So far these studies have concen-trated on total and energy-resolved ionization probabilities [1][2][3][4][5][6]. Theoretical work in this context has focused on numerical approaches [4] that often employ the suddenimpact approximation and on one-dimensional models [5,6] which try to capture the most significant physical effects occuring along the direction of polarization of a linearly polarized HCP.…”

Section: Introductionmentioning

confidence: 99%

“…Recent experimental [1][2][3] and theoretical [4][5][6] investigations have demonstrated that (almost) unipolar, high power electromagnetic field pulses are a useful new spectroscopic tool which is particularly well suited for investigating the dynamics of weakly bound Rydberg electrons. In current experiments the duration τ of these half-cycle pulses (HCPs) extends from the subpicosecond to the nanosecond regime.…”

Section: Introductionmentioning

confidence: 99%

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Excitation of weakly bound Rydberg electrons by half-cycle pulses

Zobay

Alber

1999

Phys. Rev. A

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to be published in Phy. Rev. AThe interaction of a weakly bound Rydberg electron with an electromagnetic half-cycle pulse (HCP) is described with the help of a multidimensional semiclassical treatment. This approach relates the quantum evolution of the electron to its underlying classical dynamics. The method is nonperturbative and is valid for arbitrary spatial and temporal shapes of the applied HCP. On the basis of this approach angle-and energy-resolved spectra resulting from the ionization of Rydberg atoms by HCPs are analyzed. The different types of spectra obtainable in the sudden-impact approximation are characterized in terms of the appearing semiclassical scattering phenomena. Typical modifications of the spectra originating from finite pulse effects are discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Excitation of weakly bound Rydberg electrons by half-cycle pulses

Zobay

Alber

1999

Phys. Rev. A

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“…PACS numbers: 32.80.Rm, 03.65.Sq High power, nearly unipolar electromagnetic field pulses are a useful new spectroscopic tool in particular for studying the dynamics of weakly bound Rydberg electrons. Various experimental [1][2][3] and theoretical [4,5] investigations on the interaction between Rydberg atoms and HCPs have already been performed. In particular, the theoretical approaches which have been used so far involve either fully quantum mechanical calculations, purely classical simulations, or simplified onedimensional model problems.…”

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confidence: 99%

Semiclassical interferences and catastrophes in the ionization of Rydberg atoms by half-cycle pulses

Alber

Zobay

1999

Phys. Rev. A

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Ionization of Stark states with half-cycle pulses: Interference effects in the continuum

2003

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We study the ionization of extreme Stark states in sodium by THz electromagnetic half-cycle pulses. The results of our full-quantum calculations reveal the presence of an oscillatory pattern in the ionization spectra of extreme red ͑downhill͒ states that have been kicked away from the ion core ͑downhill with respect to the potential imposed by the Stark field͒. We find no oscillations in the spectra of extreme blue ͑uphill͒ states that have been kicked towards the ion core ͑also downhill with respect to the Stark potential͒. The oscillatory pattern in the red state ionization spectra is explained with a one-dimensional semiclassical model in terms of interferences between two classical paths. This model also predicts that the blue state ionization spectra should also show oscillatory behavior. The absence of the oscillations in the full calculations can be regarded as a breakdown of the one-dimensional model in representing the ionization dynamics of these states. We find that the one-dimensional model fails when the duration of the THz pulse is comparable to the classical Kepler orbit time.

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Semiclassical study of the ionization spectra of Rydberg atoms driven by intense half-cycle pulses

Cited by 4 publications

References 15 publications

Excitation of weakly bound Rydberg electrons by half-cycle pulses

Excitation of weakly bound Rydberg electrons by half-cycle pulses

Semiclassical interferences and catastrophes in the ionization of Rydberg atoms by half-cycle pulses

Ionization of Stark states with half-cycle pulses: Interference effects in the continuum

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