Direct observation of super-excited states in methane created by a femtosecond intense laser field

A. Azarm; H. L. Xu; Y. Kamali; J. Bernhardt; D. Song; A. Xia; Teranishi Yoshiaki; S. H. Lin; F. Kong; S. L. Chin

doi:10.1088/0953-4075/41/22/225601

Direct observation of super-excited states in methane created by a femtosecond intense laser field

A. Azarm, H. L. Xu, Y. Kamali, J. Bernhardt, D. Song, A. Xia, Teranishi Yoshiaki, S. H. Lin, F. Kong, S. L. Chin

Institute of Physics

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

32 Scopus citations

Abstract

We report, for the first time, a direct observation of the super-excited states of CH₄ in femtosecond intense laser fields using a pump (800 nm)-probe (1338 nm) technique. An unambiguous depletion of the CH (A ²Δ → X²Π) fluorescence signal as a function of the delay time is attributed to the de-excitation of the super-excited states by the probe laser pulse. The lifetime of the super-excited state is measured to be about 160 fs.

Original language	English
Article number	225601
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	41
Issue number	22
DOIs	https://doi.org/10.1088/0953-4075/41/22/225601
State	Published - 1 Dec 2008

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title = "Direct observation of super-excited states in methane created by a femtosecond intense laser field",

abstract = "We report, for the first time, a direct observation of the super-excited states of CH4 in femtosecond intense laser fields using a pump (800 nm)-probe (1338 nm) technique. An unambiguous depletion of the CH (A 2Δ → X2Π) fluorescence signal as a function of the delay time is attributed to the de-excitation of the super-excited states by the probe laser pulse. The lifetime of the super-excited state is measured to be about 160 fs.",

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T1 - Direct observation of super-excited states in methane created by a femtosecond intense laser field

AU - Azarm, A.

AU - Xu, H. L.

AU - Kamali, Y.

AU - Bernhardt, J.

AU - Song, D.

AU - Xia, A.

AU - Yoshiaki, Teranishi

AU - Lin, S. H.

AU - Kong, F.

AU - Chin, S. L.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - We report, for the first time, a direct observation of the super-excited states of CH4 in femtosecond intense laser fields using a pump (800 nm)-probe (1338 nm) technique. An unambiguous depletion of the CH (A 2Δ → X2Π) fluorescence signal as a function of the delay time is attributed to the de-excitation of the super-excited states by the probe laser pulse. The lifetime of the super-excited state is measured to be about 160 fs.

AB - We report, for the first time, a direct observation of the super-excited states of CH4 in femtosecond intense laser fields using a pump (800 nm)-probe (1338 nm) technique. An unambiguous depletion of the CH (A 2Δ → X2Π) fluorescence signal as a function of the delay time is attributed to the de-excitation of the super-excited states by the probe laser pulse. The lifetime of the super-excited state is measured to be about 160 fs.

UR - http://www.scopus.com/inward/record.url?scp=63749085867&partnerID=8YFLogxK

U2 - 10.1088/0953-4075/41/22/225601

DO - 10.1088/0953-4075/41/22/225601

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AN - SCOPUS:63749085867

SN - 0953-4075

VL - 41

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

IS - 22

M1 - 225601

ER -

Direct observation of super-excited states in methane created by a femtosecond intense laser field

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