Abstract
The propagation of the pump and its third harmonic pulses in a cubically nonlinear medium is considered theoretically, provided that the linear properties of the medium are characterized by a negative refractive index at the pump frequency and a positive refractive index at the harmonic frequency. For low-intensity interacting waves, the pump and third harmonic pulses propagate in opposite directions, but sufficiently intense pulses can produce a simulton-a solitary two-frequency wave that propagates in a certain direction as a single whole. The system of equations is investigated numerically for a model that, apart from the harmonic generation, includes the second-order group velocity dispersion and the nonlinear self- and cross-phase modulations of the interacting waves. The separation of the pump and harmonic pulses due to the difference in the directions of their group velocities and peculiarities of the Manley-Rowe relation for parametric processes in metamedia are discussed.
Original language | English (US) |
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Pages (from-to) | 157-169 |
Number of pages | 13 |
Journal | Journal of Experimental and Theoretical Physics |
Volume | 111 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2010 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy