Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching

W.A. Bryan; S.L. Stebbings; E.M.L. English; T.R.J. Goodworth; W.R. Newell; J. McKenna; M. Suresh; Balasingam Srigengan; Ian Williams; I.C.E. Turcu; J.M. Smith; E.J. Divall; C.J. Hooker; A.J. Langley

doi:10.1103/PhysRevA.73.013407

Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching

W.A. Bryan, S.L. Stebbings, E.M.L. English, T.R.J. Goodworth, W.R. Newell, J. McKenna, M. Suresh, Balasingam Srigengan, Ian Williams, I.C.E. Turcu, J.M. Smith, E.J. Divall, C.J. Hooker, A.J. Langley

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

We report an experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is observed over the intensity range 10 TW/cm(2) to 10 PW/cm(2) using effective intensity matching (EIM), which is coupled with intensity selective scanning (ISS) to recover the geometry-independent probability of ionization. Such measurements, made possible by quantifying diffraction effects in the laser focus, are compared directly to theoretical predictions of multiphoton, tunnel and field ionization, and a remarkable agreement demonstrated. EIM-ISS allows the straightforward quantification of the probability of recollision ionization in a linearly polarized laser pulse. Furthermore, the probability of ionization is discussed in terms of the Keldysh adiabaticity parameter gamma, and the influence of the precursor ionic states present in recollision ionization is observed.

Original language	English
Pages (from-to)	013407-1-013407-10
Number of pages	10
Journal	Physical Review A
Volume	73
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.73.013407
Publication status	Published - Jan 2006

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Physics and Astronomy

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Bryan, W. A., Stebbings, S. L., English, E. M. L., Goodworth, T. R. J., Newell, W. R., McKenna, J., Suresh, M., Srigengan, B., Williams, I., Turcu, I. C. E., Smith, J. M., Divall, E. J., Hooker, C. J., & Langley, A. J. (2006). Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching. Physical Review A, 73(1), 013407-1-013407-10. https://doi.org/10.1103/PhysRevA.73.013407

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title = "Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching",

abstract = "We report an experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is observed over the intensity range 10 TW/cm(2) to 10 PW/cm(2) using effective intensity matching (EIM), which is coupled with intensity selective scanning (ISS) to recover the geometry-independent probability of ionization. Such measurements, made possible by quantifying diffraction effects in the laser focus, are compared directly to theoretical predictions of multiphoton, tunnel and field ionization, and a remarkable agreement demonstrated. EIM-ISS allows the straightforward quantification of the probability of recollision ionization in a linearly polarized laser pulse. Furthermore, the probability of ionization is discussed in terms of the Keldysh adiabaticity parameter gamma, and the influence of the precursor ionic states present in recollision ionization is observed.",

author = "W.A. Bryan and S.L. Stebbings and E.M.L. English and T.R.J. Goodworth and W.R. Newell and J. McKenna and M. Suresh and Balasingam Srigengan and Ian Williams and I.C.E. Turcu and J.M. Smith and E.J. Divall and C.J. Hooker and A.J. Langley",

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Bryan, WA, Stebbings, SL, English, EML, Goodworth, TRJ, Newell, WR, McKenna, J, Suresh, M, Srigengan, B, Williams, I, Turcu, ICE, Smith, JM, Divall, EJ, Hooker, CJ & Langley, AJ 2006, 'Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching', Physical Review A, vol. 73, no. 1, pp. 013407-1-013407-10. https://doi.org/10.1103/PhysRevA.73.013407

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T1 - Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching

AU - Bryan, W.A.

AU - Stebbings, S.L.

AU - English, E.M.L.

AU - Goodworth, T.R.J.

AU - Newell, W.R.

AU - McKenna, J.

AU - Suresh, M.

AU - Srigengan, Balasingam

AU - Williams, Ian

AU - Turcu, I.C.E.

AU - Smith, J.M.

AU - Divall, E.J.

AU - Hooker, C.J.

AU - Langley, A.J.

PY - 2006/1

Y1 - 2006/1

N2 - We report an experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is observed over the intensity range 10 TW/cm(2) to 10 PW/cm(2) using effective intensity matching (EIM), which is coupled with intensity selective scanning (ISS) to recover the geometry-independent probability of ionization. Such measurements, made possible by quantifying diffraction effects in the laser focus, are compared directly to theoretical predictions of multiphoton, tunnel and field ionization, and a remarkable agreement demonstrated. EIM-ISS allows the straightforward quantification of the probability of recollision ionization in a linearly polarized laser pulse. Furthermore, the probability of ionization is discussed in terms of the Keldysh adiabaticity parameter gamma, and the influence of the precursor ionic states present in recollision ionization is observed.

AB - We report an experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is observed over the intensity range 10 TW/cm(2) to 10 PW/cm(2) using effective intensity matching (EIM), which is coupled with intensity selective scanning (ISS) to recover the geometry-independent probability of ionization. Such measurements, made possible by quantifying diffraction effects in the laser focus, are compared directly to theoretical predictions of multiphoton, tunnel and field ionization, and a remarkable agreement demonstrated. EIM-ISS allows the straightforward quantification of the probability of recollision ionization in a linearly polarized laser pulse. Furthermore, the probability of ionization is discussed in terms of the Keldysh adiabaticity parameter gamma, and the influence of the precursor ionic states present in recollision ionization is observed.

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JO - Physical Review A

JF - Physical Review A

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Geometry- and diffraction-independent ionization probabilities in intense laser fields: Probing atomic ionization mechanisms with effective intensity matching

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