High-order harmonic generation from solid targets with 2 mJ pulses

Harmonics up to the 18th order are generated from solid targets by focusing 2 mJ, 50 fs pulses at 800 nm to a spot size of 1.7 μm (FWHM). To our knowledge, this is the first demonstration of high-harmonic generation with a very short focal length paraboloid (f/1.4) and kilohertz laser system. The ha...

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Bibliographic Details
Published inOptics letters Vol. 35; no. 19; p. 3186
Main Authors Easter, James H, Mordovanakis, Aghapi G, Hou, Bixue, Thomas, Alexander G R, Nees, John A, Mourou, Gérard, Krushelnick, Karl
Format Journal Article
LanguageEnglish
Published United States 01.10.2010
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Summary:Harmonics up to the 18th order are generated from solid targets by focusing 2 mJ, 50 fs pulses at 800 nm to a spot size of 1.7 μm (FWHM). To our knowledge, this is the first demonstration of high-harmonic generation with a very short focal length paraboloid (f/1.4) and kilohertz laser system. The harmonics have a low divergence (<4°) compared to the driving beam and conversion efficiencies (>10(-7) per harmonic) comparable to gas harmonics. No contrast enhancement techniques are employed, and the system is capable of operating at 500 Hz.
ISSN:1539-4794
DOI:10.1364/OL.35.003186