Abstract

We demonstrate high-harmonic generation in H2O using 800 and 1300nm laser pulses up to a maximum intensity of 5×1014W/cm2. Under optimal phase-matching conditions, photon energies up to ~60 and ~87 eV are produced by using 800 and 1300nm light, respectively. The harmonic spectra in H2O, when compared with Xe with a similar ionization potential, exhibit significant extension of the cutoff region, indicating suppression of ionization arising from molecular orbital symmetry.

© 2010 Optical Society of America

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