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Proceedings Paper

Extending HHG spectroscopy to new molecular species
Author(s): F. McGrath; P. Hawkins; E. Simpson; T. Siegel; Z. Diveki; D. Austin; A. Zair; M. Castillejo; J. P. Marangos
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Paper 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.

Paper Details

Date Published: 7 March 2014
PDF: 9 pages
Proc. SPIE 8984, Ultrafast Phenomena and Nanophotonics XVIII, 89841B (7 March 2014); doi: 10.1117/12.2039123
Show Author Affiliations
F. McGrath, Imperial College London (United Kingdom)
P. Hawkins, Imperial College London (United Kingdom)
E. Simpson, Imperial College London (United Kingdom)
T. Siegel, Imperial College London (United Kingdom)
Z. Diveki, Imperial College London (United Kingdom)
D. Austin, Imperial College London (United Kingdom)
A. Zair, Imperial College London (United Kingdom)
M. Castillejo, Consejo Superior de Investigaciones Científicas (Spain)
J. P. Marangos, Imperial College London (United Kingdom)

Published in SPIE Proceedings Vol. 8984:
Ultrafast Phenomena and Nanophotonics XVIII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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