Optimization of the focused flux of high harmonics

Abstract : Following the theoretical predictions, the observation of two-photon processes by interaction of vacuum ultraviolet (VUV) radiation with inner-shell levels of atoms requires focused intensities in the 10^13-10^14 W/cm^2 range. Our aim is to reach this regime in order to study non-linear optics at these wavelengths. We first optimized the high harmonic conversion efficiency in argon by studying the best experimental conditions for phase-matching, concentrating on focus geometry related to laser energy, cell length and position relative to the focus. We then studied the resulting harmonic beam focusability by a toroidal mirror ( f=10 cm) and made an image of the harmonic focus. We conclude with an evaluation of the focused intensity that we are able to reach experimentally.
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Submitted on : Monday, October 4, 2010 - 1:28:03 PM
Last modification on : Monday, October 21, 2019 - 4:00:15 PM

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Sophie Kazamias, D. Douillet, Constance Valentin, Thierry Lefrou, G. Grillon, et al.. Optimization of the focused flux of high harmonics. The European Physical Journal D : Atomic, molecular, optical and plasma physics, EDP Sciences, 2003, 26 (1), pp.47 - 50. ⟨10.1140/epjd/e2003-00083-y⟩. ⟨hal-00523078⟩

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