High-harmonic generation from plasma mirrors at kilohertz repetition rate

We report the first demonstration of high-harmonic generation from plasma mirrors at a 1 kHz repetition rate. Harmonics up to nineteenth order are generated at peak intensities close to 10¹⁸ W/cm² by focusing 1 mJ, 25 fs laser pulses down to 1.7 μm FWHM spot size without any prior wavefront correcti...

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Bibliographic Details
Published in:Optics letters 2011-04, Vol.36 (8), p.1461-1463
Main Authors: BOROT, Antonin, MALVACHE, Arnaud, LOPEZ-MARTENS, Rodrigo, XIAOWEI CHEN, DOUILLET, Denis, IAQUIANIELLO, Gregory, LEFROU, Thierry, AUDEBERT, Patrick, GEINDRE, Jean-Paul, MOUROU, Gérard, QUERE, Fabien
Format: Article
Language:English
Subjects:
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optics
Physics
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Summary:We report the first demonstration of high-harmonic generation from plasma mirrors at a 1 kHz repetition rate. Harmonics up to nineteenth order are generated at peak intensities close to 10¹⁸ W/cm² by focusing 1 mJ, 25 fs laser pulses down to 1.7 μm FWHM spot size without any prior wavefront correction onto a moving target. We minimize target surface motion with respect to the laser focus using online interferometry to ensure reproducible interaction conditions for every shot and record data at 1 kHz with unprecedented statistics. This allows us to unambiguously identify coherent wake emission as the main generation mechanism.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.36.001461