We show that, in the high wave-vector-mismatch (cascading) limit, the well-known paraxial description of parametric frequency conversion in quadratic media entails effective lensing effects, which can have a self-focusing or a self-defocusing nature, critically depending on the mismatch sign, the selected wave, and the launching condition (second-harmonic generation or downconversion). Numerical and experimental evidence of this behavior is reported.

Effective lensing effects in parametric frequency conversion

TRILLO, Stefano;
2002

Abstract

We show that, in the high wave-vector-mismatch (cascading) limit, the well-known paraxial description of parametric frequency conversion in quadratic media entails effective lensing effects, which can have a self-focusing or a self-defocusing nature, critically depending on the mismatch sign, the selected wave, and the launching condition (second-harmonic generation or downconversion). Numerical and experimental evidence of this behavior is reported.
2002
C., Conti; Trillo, Stefano; P., Di Trapani; J., Kilius; A., Bramati; S., Minardi; W., Chinaglia; G., Valiulis
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1689514
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