Extending HHG spectroscopy to new molecular species

F. McGrath; P. Hawkins; E. Simpson; T. Siegel; Z. Diveki; D. Austin; A. Zair; M. Castillejo; J. P. Marangos

doi:10.1117/12.2039123

7 March 2014 Extending HHG spectroscopy to new molecular species

F. McGrath, P. Hawkins, E. Simpson, T. Siegel, Z. Diveki, D. Austin, A. Zair, M. Castillejo, J. P. Marangos

Proceedings Volume 8984, Ultrafast Phenomena and Nanophotonics XVIII; 89841B (2014) https://doi.org/10.1117/12.2039123
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

We present technical and experimental advances for performing HHG experiments in a range of substituted benzene molecules starting in the liquid phase. We demonstrate sub 3% fluctutaions in the harmonic signal generated in a benzene vapour backed continuous flow gas jet using a mid-IR laser source. The longer drive wavelength is necessary as the target molecules have low ionization potential and exhibit femtosecond timescale dynamics. We present the acquisition of stable and reproducible harmonic spectra from a range of substituted benzene molecules and the dependence of HHG upon the ellipticity of the laser beam was measured for a number of molecules.

Citation Download Citation

F. McGrath, P. Hawkins, E. Simpson, T. Siegel, Z. Diveki, D. Austin, A. Zair, M. Castillejo, and J. P. Marangos "Extending HHG spectroscopy to new molecular species", Proc. SPIE 8984, Ultrafast Phenomena and Nanophotonics XVIII, 89841B (7 March 2014); https://doi.org/10.1117/12.2039123

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