Multiphoton ionization and EM field gradient forces

Hollis, M.J.

doi:10.1016/0030-4018(78)90154-2

Cited by 36 publications

(5 citation statements)

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“…This was triggered by the discovery in Saclay of 'above threshold ionization' (ATI) (Agostini et al 1979) in which outgoing photoelectrons in sufficiently strong-fields (of the order of 10 13 W cm 2 ) are able to absorb further photons than the minimum necessary for ionization. Early energy-analysed multiphoton ionization experiments (Martin and Mandel 1976, Hollis 1978, Boreham and Luther-Davies 1979 saw energetic electrons, but the clear discrimination of discrete electron peaks had to wait for the development of high resolution 'bottle spectrometers' (Kruit and Read 1983). Since then, many groups have studied ATI in detail (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Atomic physics with super-high intensity lasers

1997

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We review the phenonomena which occur in multiphoton physics when the electric field of the applied laser radiation becomes comparable with the Coulomb field strength seen by an electron in the ground state of atomic hydrogen. This field is reached at an irradiance of approximately 3 × 10 16 W cm −2 . The normal perturbative photon-by-photon based picture of the interaction of individual electrons with the field is replaced by a tunnelling picture in which, in a time of the order of, or less than one optical cycle, atomic wavepackets are generated which escape the confining Coulomb potential. These wavepackets are strongly influenced by the laser, 'quiver' and may be accelerated back to the parent ion in a recollision process. Phase-coherent effects locked to the laser field become important: high harmonics are generated from these recollisions. We discuss the theory of such effects, and review progress in understanding how this quiver motion can be coherently controlled. We discuss ionization dynamics and review mechanisms by which atoms may be stabilized in very strong fields. Finally, we discuss relativistic effects which occur at very high-intensities.

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Section: Introductionmentioning

confidence: 99%

Atomic physics with super-high intensity lasers

1997

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“…Up to now several investigations, both theoretical and experimental, have been made of the relationship between ATI and the ponderomotive force (Hollis 1978, Kruit et a1 1983a, Bucksbaum et a1 1987. All experiments, however, involved wavelengths near the visible range.…”

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confidence: 99%

“…if the particles leave the field before it has had time to vary appreciably: the 'high-intensity' case of Hollis (1978).…”

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confidence: 99%

Multiphoton ionisation of rare gases by a CO₂laser: electron spectroscopy

Xiong

Yergeau

Chin

et al. 1988

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

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“…In effect, particles are pushed away from regions of high to lower intensities which can be utilized for the confinement of charged particles and plasmas . Since then a wealth of phenomena associated with the ponderomotive force have been revealed with applications in diverse areas, ranging from accelerator physics and optical manipulation to plasma physics and biology. Our present work is motivated by a relatively recent experimental study on the acceleration of neutral atoms in a strong Gaussian laser beam.…”

Section: Introductionmentioning

confidence: 99%

Accelerating, guiding, and sub‐wavelength trapping of neutral atoms with tailored optical vortices

et al. 2017

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Single neutral atom mechanics is controllable by focused, high‐intensity optical vortices. The intensity‐dependent, laser‐driven motion of the atom's active electrons subsumes to a net transfer of the orbital angular momentum of the light to the neutral atom. The ponderomotive force on these electrons translates so into an unbounded or a bounded radial drift of the atom depending on its initial kinetic energy, as set by the temperature. Appropriate combination of laser beams results in sub‐wavelength, dynamical radial traps for tweezing atoms controllably, an effect that can be exploited for atom guiding, structuring, and lithographic applications.

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Multiphoton ionization and EM field gradient forces

Cited by 36 publications

References 10 publications

Atomic physics with super-high intensity lasers

Atomic physics with super-high intensity lasers

Multiphoton ionisation of rare gases by a CO₂laser: electron spectroscopy

Accelerating, guiding, and sub‐wavelength trapping of neutral atoms with tailored optical vortices

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Multiphoton ionization and EM field gradient forces

Cited by 36 publications

References 10 publications

Atomic physics with super-high intensity lasers

Atomic physics with super-high intensity lasers

Multiphoton ionisation of rare gases by a CO2laser: electron spectroscopy

Accelerating, guiding, and sub‐wavelength trapping of neutral atoms with tailored optical vortices

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Multiphoton ionisation of rare gases by a CO₂laser: electron spectroscopy