Abstract
We demonstrate high-harmonic generation in using 800 and laser pulses up to a maximum intensity of . Under optimal phase-matching conditions, photon energies up to ~60 and ~87 eV are produced by using 800 and light, respectively. The harmonic spectra in , 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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