Near-field dynamics of ultrashort pulsed Bessel beams in media with Kerr nonlinearity

P. Polesana, A. Dubietis, M. A. Porras, E. Kučinskas, D. Faccio, A. Couairon, and P. Di Trapani

Phys. Rev. E 73, 056612 – Published 22 May 2006

Abstract

The near-field dynamics of a femtosecond Bessel beam propagating in a Kerr nonlinear medium (fused silica) is investigated both numerically and experimentally. We demonstrate that the input Bessel beam experiences strong nonlinear reshaping. Due to the combined action of self-focusing and nonlinear losses the reshaped beam exhibits a radial compression and reduced visibility of the Bessel oscillations. Moreover, we show that the reshaping process starts from the intense central core and gradually replaces the Bessel beam profile during propagation, highlighting the conical geometry of the energy flow.

Received 10 April 2006

DOI:https://doi.org/10.1103/PhysRevE.73.056612

Authors & Affiliations

P. Polesana^1,*, A. Dubietis^1,†, M. A. Porras², E. Kučinskas¹, D. Faccio³, A. Couairon⁴, and P. Di Trapani^1,3

¹Department of Quantum Electronics, Vilnius University, Saulėtekio Ave. 9, bldg.3, LT-10222 Vilnius, Lithuania
²Departamento de Fisica Aplicada, Universidad Politecnica de Madrid, Rios Rosas 21, E-28003 Madrid, Spain
³Dipartimento di Fisica, Università dell’Insubria, via Vallegio, 11 22100 Como, Italy
⁴Centre de Physique Theorique, Ecole Polytechnique, CNRS UMR 7644, F-91128 Palaiseau, France

^*Permanent address: Dipartimento di Fisica Università dell’Insubria, via Vallegio, 11 22100 Como, Italy.
^†Author to whom all correspondence should be addressed: Email address: audrius.dubietis@ff.vu.lt

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Issue

Vol. 73, Iss. 5 — May 2006

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Physical Review E

covering statistical, nonlinear, biological, and soft matter physics