Spatial interferences of photodetachment near a repulsive center

Yang, Biwei; Delos, J. B.; Du, M. L.

doi:10.1103/physreva.88.023409

Cited by 9 publications

(28 citation statements)

References 50 publications

(29 reference statements)

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“…(36) has been neglected owing to the same argument as in Ref. [23]. For a p zwave source like H − , the simplified wave function for each trajectory is…”

Section: A Semiclassical Propagationmentioning

confidence: 99%

“…5, a uniform approximation as in Ref. [23] has also been used near an outmost caustic. To compare with the semiclassical result, the exact quantum flux for H − given by Eq.…”

Section: Interferences and Caustic Bifurcationmentioning

confidence: 99%

“…by combining the reduction procedures in Appendices of Refs. [20,23]. Note the derivative dr/dθ in Eqs.…”

Section: Appendix A: Solving the Classical Electron-orbit Equationmentioning

confidence: 99%

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Temporal interferences driven by a single-cycle terahertz pulse in the photodetachment dynamics of negative ions

Yang

Robicheaux

2015

Phys. Rev. A

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We present theory and calculations of a real-time-domain interferometry for the photodetachment dynamics of negative ions in the presence of a single-cycle terahertz pulse. The photoelectron can follow two or more classical trajectories to arrive at a detector simultaneously allowing the electron waves to interfere quantum mechanically. Both the inphase and antiphase oscillations can be observed in the photoelectron interferences from negative hydrogen and fluorine ions depending on the pulse strength and the observing angle. Especially, a temporal-caustic bifurcation is observed when the detection angle is not in the line with the pulse polarization direction. Similar interferences and bifurcations are also expected in the angle-resolved energy spectrum, as a result of its approximate equivalence with the time-dependent electron flux at large distances.

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“…(36) has been neglected owing to the same argument as in Ref. [23]. For a p zwave source like H − , the simplified wave function for each trajectory is…”

Section: A Semiclassical Propagationmentioning

confidence: 99%

“…5, a uniform approximation as in Ref. [23] has also been used near an outmost caustic. To compare with the semiclassical result, the exact quantum flux for H − given by Eq.…”

Section: Interferences and Caustic Bifurcationmentioning

confidence: 99%

See 1 more Smart Citation

Temporal interferences driven by a single-cycle terahertz pulse in the photodetachment dynamics of negative ions

Yang

Robicheaux

2015

Phys. Rev. A

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“…Similar phenomena were predicted for photodetachment in parallel electric and magnetic fields [5][6][7] and other external fields, particularly due to metallic and dielectric surfaces [8][9][10][11]. Experimental observations of spatial interference in static electric fields [12] allow very precise determination of electron affinities [13][14][15].…”

Section: Introductionmentioning

confidence: 57%

Photodetachment microscopy in time-dependent fields

Ambalampitiya

Fabrikant

2017

Phys. Rev. A

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Photodetachment of negative ions in combined laser and low-frequency fields is investigated. The time-dependent Green's function method is used for calculation of electron flux at a macroscopic distance away from the photodetachment source, typical for a photodetachment microscopy experiment. In calculating the electron flux, we use the stationary phase method for the time integral, equivalent to the semiclassical approximation, to compute the time dependent wavefunction. The stationary points t (i) 1 , i = 1, ..., n correspond to time instances of launching of classical trajectories arriving at the detector at a given space-time point (r, t). The number of trajectories n contributing to the electron flux at any point in the classically allowed space-time domain can be controlled by varying the switching interval of the high frequency laser which initiates the photodetachment process. The divergences inherent in the electron flux in the semiclassical treatment are removed by using the uniform Airy approximation near the caustics.

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“…Then Yang, Delos and Du explained the experimental results by constructing a theoretical model of photodetachment near a repulsive center. They have considered the effects of the nearby repulsive center on both the differential [16] and total [17] photodetachment cross section.…”

Section: Introductionmentioning

confidence: 99%

Photodetachment dynamics near an attractive Coulomb center

You¹,

Du²

2017

J. Phys. B: At. Mol. Opt. Phys.

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This article studies the photodetachment of a single electron anion near an attractive center.Both the differential and total photodetachment cross section are analysed. We obtain the electron flux crossing through a spherical detector centered at the force center using the semiclassical approximation. The closed-orbit theory gives the total cross section which contains a smooth background and an oscillatory part. Concrete calculations and discussions are carried out for two types of wave source: the s-and p z -wave source. Photodetachment processes for three conditions are compared: an anion near an attractive center, near a repulsive center and in a homogeneous electric field.

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Spatial interferences of photodetachment near a repulsive center

Cited by 9 publications

References 50 publications

Temporal interferences driven by a single-cycle terahertz pulse in the photodetachment dynamics of negative ions

Temporal interferences driven by a single-cycle terahertz pulse in the photodetachment dynamics of negative ions

Photodetachment microscopy in time-dependent fields

Photodetachment dynamics near an attractive Coulomb center

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