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Titel: Nonlocal description of X waves in quadratic nonlinear materials
Type: Journal articleJournal article
Person(er):
Forfatter:  Larsen, Peter Ulrik Vingaard (Cwisno: 13849)
Technical University of Denmark

Forfatter:  Sørensen, Mads Peter (Cwisno: 2425)
Technical University of Denmark
Email:

Forfatter:  Bang, Ole (Cwisno: 6148)
Technical University of Denmark
Email:

Forfatter:  Krolikowski, W. Z.
Laser Physics Center, Research School of Physical Sciences, Australian National University

Forfatter:  Trillo, S.
Istituto Nazionale de Fisica Materia and Department of Engineering, University of Ferrara, Italy
Uddrag: We study localized light bullets and X-waves in quadratic media and show how the notion of nonlocality can provide an alternative simple physical picture of both types of multi-dimensional nonlinear waves. For X-waves we show that a local cascading limit in terms of a nonlinear Schrodinger equation does not exist - one needs to use the nonlocal description, because the nonlocal response function does not converge towards a delta-function. Also, we use the nonlocal theory to show for the first time that the coupling to second harmonic is able to generate an X-shape in the fundamental field despite having anomalous dispersion, in contrast to the predictions of the cascading limit.
Publiceret: in journal: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) (ISSN: 1539-3755) (DOI: http://dx.doi.org/10.1103/PhysRevE.73.036614), vol: 73, issue: 3, pages: 036614, 2006
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Matematiktorvet303 B2800 Kgs. LyngbyTlf. 4525 3031CVR-nr. 30 06 09 46EAN-nr. 5798000428515
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