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Extending HHG Spectroscopy to New Molecular Species

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Abstract

We present developments made for performing HHG experiments with samples starting in the liquid phase. We demonstrate a sub 3% fluctuation in the harmonic signal generated from a vapour backed continuous gas jet using an organic liquid target (e.g. benzene, fluorobenzene, toluene). Low ionisation potentials and expected femtosecond timescale dynamics necessitate the use of longer wavelengths from a mid-IR source. The acquisition of stable reproducible harmonic spectra has been verified and the dependence of HHG upon ellipticity was measured for a number of molecules.

© 2013 Optical Society of America

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