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

Polesana, P; Dubietis, A; Porras, M A; Kucinskas, E; Faccio, D; Couairon, A; Di Trapani, P

Polesana, P; Dubietis, A; Porras, M A; Kucinskas, E; Faccio, D; Couairon, A; Di Trapani, P.

Afiliación

Polesana P; Department of Quantum Electronics, Vilnius University, Lithuania. audrius.dubietis@ff.vu.lt

Phys Rev E Stat Nonlin Soft Matter Phys ; 73(5 Pt 2): 056612, 2006 May.

Article en En | MEDLINE | ID: mdl-16803062

RESUMEN

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.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev E Stat Nonlin Soft Matter Phys Asunto de la revista: BIOFISICA / FISIOLOGIA Año: 2006 Tipo del documento: Article País de afiliación: Lituania Pais de publicación: Estados Unidos

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