Quadratic solitons in media with negative refractive index
Abstract
The propagation of pulses of the pump and its second harmonic in a quadratically nonlinear medium whose linear properties are characterized by a negative refractive index at the pump frequency and by a positive refractive index at the harmonic frequency is considered theoretically. In the case of a low intensity of the interacting waves, the pump and second-harmonic pulses propagate in the opposite directions, but sufficiently powerful pulses can form a simulton—a solitary two-frequency wave propagating in a certain direction as a single whole. Solutions to a set of equations are found which describe the steady-state propagation of a solitary wave and of a nonlinear periodic (cnoidal) wave.
- Publication:
-
Optics and Spectroscopy
- Pub Date:
- January 2007
- DOI:
- 10.1134/S0030400X07010171
- Bibcode:
- 2007OptSp.102...90M
- Keywords:
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- 42.65.Tg