Experimental studies of self-suppression of vacuum ultraviolet generation in Xe

J. P. Judish, S. L. Allman, W. R. Garrett, M. G. Payne

Published Nov 1, 1988• 0 citations

Abstract

Vacuum ultraviolet light in the range 116 nm to 117 nm was produced by using a two-photon resonant four-wave mixing scheme in Xe. The buildup of coherent cancellation of the two-photon resonant transition employed in the generation of the vacuum ultraviolet, with resulting limitations imposed on the achievable vacuum ultraviolet intensity was investigated. Under certain predicted conditions, increases in the intensity of one of the pumping beams, approx.1500 nm infrared, or tuning this beam towards resonance with the 5p/sup 5/7s(3/2)/sub 1/ level of Xe led, not to increases, but decreases in the vacuum ultraviolet generated. 3 refs., 3 figs.

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Experimental studies of self-suppression of vacuum ultraviolet generation in Xe

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Published Nov 1, 1988• 0 citations

OpenAlex

Abstract

Related papers

Experimental studies of self-suppression of vacuum ultraviolet generation in Xe

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Vacuum ultraviolet light in the range 116 nm to 117 nm was produced by using a two‐photon resonant four‐wave mixing scheme in Xe. The buildup of coherent cancellation of the two‐photon resonant transition employed in the generation of the vacuum ultraviolet, with resulting limitations imposed on the achievable vacuum ultraviolet intensity was investigated. Under certain predicted conditions, increases in the intensity of one of the pumping beams, ≊1500 nn infrared, or tuning this beam towards resonance with the 5p 57s(3/2)1 level of Xe led, not to increases, but decreases in the vacuum ultraviolet generated.Vacuum ultraviolet light in the range 116 nm to 117 nm was produced by using a two‐photon resonant four‐wave mixing scheme in Xe. The buildup of coherent cancellation of the two‐photon resonant transition employed in the generation of the vacuum ultraviolet, with resulting limitations imposed on the achievable vacuum ultraviolet intensity was investigated. Under certain predicted conditions, increases in the intensity of one of the pumping beams, ≊1500 nn infrared, or tuning this beam towards resonance with the 5p 57s(3/2)1 level of Xe led, not to increases, but decreases in the vacuum ultraviolet generated.

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Physical Review AJul 1, 199119 citations

s

excited states [5/2]

{}_{2}

, [3/2]

{}_{2}

, and [1/2]

{}_{0}

were examined. At the [1/2]

{}_{0}

resonant state, the ion signals were not decreased but slightly increased with the increase of the IR laser power. No suppression of the ion signal was observed at the [5/2]

{}_{2}

resonant state, when the polarization directions of the lasers were perpendicular to each other. The result of the polarization dependence reflects the selection rules of four-wave mixing. A simple rate equation analysis including the contribution of two-photon ionization from the [1/2]

{}_{0}

state by the IR laser well represents the IR laser-power dependence of the ion signal.

{]}_{1}^{\mathit{o}}

state. The well-known destructive interference for the ``on-resonance'' case is now shown to occur also for large detuning from the resonance (up to 2000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) probed by four-photon-resonant five-photon ionization. This type of cancellation may provide a new insight in interference effects involved in multiphoton-excitation processes.