title: Quasi-phase-matching for third harmonic generation in noble gases employing ultrasound.
abstract: We study a novel method of quasi-phase-matching for third harmonic generation in a gas cell using the periodic modulation of the gas pressure and thus of the third order nonlinear coefficient in the axial direction created by an ultrasound wave. Using a comprehensive numerical model we describe the quasi-phase matched third harmonic generation of UV (at 266 nm) and VUV pulses (at 133 nm) by using pump pulses at 800 nm and 400 nm, respectively, with pulse energy in the range from 3 mJ to 1 J. In addition, using chirped pump pulses, the generation of sub-20-fs VUV pulses without the necessity for an external chirp compensation is predicted.
authors.affiliation: Max-Born-Institute for Nonlinear optics and Fast Spectroscopy, Max-Born-Str 2a, Berlin D-12489, Germany.
authors.forename: U K
authors.initials: UK
authors.lastname: Sapaev
authors.forename: I
authors.initials: I
authors.lastname: Babushkin
authors.forename: J
authors.initials: J
authors.lastname: Herrmann
mesh_terms: D003198:Computer Simulation; D019220:High-Energy Shock Waves; D008956:Models, Chemical; D005741:Noble Gases / Q000138:chemical synthesis* / Q000528:radiation effects*; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*
chemical_list: D005741:Noble Gases