Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5375412 | Chemical Physics | 2009 | 4 Pages |
Abstract
We produce harmonics in the molecule ethylene (C2H4) with two different wavelengths and three pulse durations. Due to the low ionization potential (Ip=10.5eV) of C2H4, longer wavelengths are needed to extend the maximum photon energy produced. Our results show that regardless of the strong dependence of the efficiency of the harmonic generation process with wavelength, at 1820Â nm the cutoff observed is larger than that obtained with 800Â nm, 15Â fs pulses. We obtain harmonics with energies exceeding 70Â eV at 9.0Ã1013W/cm2 with a 73Â fs 1820Â nm pulse. Under these circumstances, the limiting factor for the further extension of the cutoff seems to be the photoionization cross section of the molecule.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
C. Trallero-Herrero, B.E. Schmidt, A.D. Shiner, P. Lassonde, Ã. Bisson, J.-C. Kieffer, P.B. Corkum, D.M. Villeneuve, F. Légaré,