Exploració per autor "Molina Terriza, Gabriel"
Ara es mostren els items 20-32 de 32
-
Reconfigurable dynamic beam shaping in seeded frequency-doubling
Molina Terriza, Gabriel; Torner Sabata, Lluís (2001-02)
Article
Accés restringit per política de l'editorialA new method that allows simultaneous frequency doubling and dynamic shaping of a Gaussian beam into a variety of light patterns is introduced. The novel technique is based on the controllable generation of multiple-vortex ... -
Simultaneous frequency conversion and beam shaping for optical-tweezers applications
Molina Terriza, Gabriel; Torner Sabata, Lluís; Minardi, S; Trapani, P Di (2003-07)
Article
Accés restringit per política de l'editorialWe review a method which allows the simultaneous frequency-conversion and shaping of a light beam into a variety of patterns. The method is based on the controllable dynamics of vortices nested in the light beams. We outline ... -
Soliton algebra by vortex beam splitting
Minardi, Stefano; Molina Terriza, Gabriel; Di Trapani, Paolo; Pérez Torres, Juan; Torner Sabata, Lluís (2001-07)
Article
Accés restringit per política de l'editorialWe experimentally demonstrate the possibility of breaking up intense vortex light beams into stable and controllable sets of parametric solitons. We report observations performed in seeded second-harmonic generation, but ... -
Structural instability of vortices in Bose-Einstein-Condensates
Garcia Ripoll, Juan José; Molina Terriza, Gabriel; Perez García, Victor M.; Torner Sabata, Lluís (2001-09)
Article
Accés restringit per política de l'editorialIn this paper we study a gaseous Bose-Einstein condensate and show the following: (i) A minimum value of the interaction is needed for the existence of stable persistent currents. (ii) Vorticity is not a fundamental invariant ... -
Superposition of non-coaxial vortices in parametric wave mixing
Sukhorukov, A P; Kalinovich, A A; Molina Terriza, Gabriel; Torner Sabata, Lluís (2002-09)
Article
Accés restringit per política de l'editorialIn this paper we present a comprehensive study of the dynamics of screw phase dislocations under conditions of noncoaxial parametric three-wave mixing in the pump low-depletion regime. Under such conditions the signal and ... -
The curious arithmetic of optical vortices
Molina Terriza, Gabriel; Recolons Martos, Jaume; Torner Sabata, Lluís (2000-08-15)
Article
Accés restringit per política de l'editorialThe superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the ... -
The curious arithmetic of optical vortices
Molina Terriza, Gabriel; Recolons Martos, Jaume; Torner Sabata, Lluís (Optical Society of America, 2000-08-15)
Article
Accés obertThe superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the ... -
The spatial shape of entangled photon states in non-collinear, walking parametric downconversion
Pérez Torres, Juan; Molina Terriza, Gabriel; Torner Sabata, Lluís (2005-08)
Article
Accés restringit per política de l'editorialWe address the spatial shape of entangled photon states generated in spontaneous parametric downconversion in non-collinear geometries, when the interacting waves exhibit Poynting vector walk-off. We discuss how such shape ... -
Twisted photons
Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2007-05)
Article
Accés restringit per política de l'editorialThe orbital angular momentum of light represents a fundamentally new optical degree of freedom. Unlike linear momentum, or spin angular momentum, which is associated with the polarization of light, orbital angular momentum ... -
Vortex evolution in parametric wave mixing
Petrov, D V; Molina Terriza, Gabriel; Torner Sabata, Lluís (1999-04)
Article
Accés obertWe investigate the evolution of vortex wave front dislocations in multiple-wave second-harmonic generation processes in quadratic nonlinear media. Vortices nested in finite-size host beams are shown to nucleate and to ... -
Vortex nucleation and evolution in parametric wave mixing
Molina Terriza, Gabriel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés obertWe predict a variety of new phenomena, that includes the spontaneous nucleation of multiple vortex twins, vortex rotation and drift, vortex-antivortex interaction and annihilation, and formation of quasi-aligned patterns ... -
Vortex revivals with trapped light
Molina Terriza, Gabriel; Torner Sabata, Lluís; Wright, E M; Garcia Ripoll, Juan José; Perez García, Victor M. (2001-10)
Article
Accés restringit per política de l'editorialWe predict that vortex dipoles nested in light beams trapped in graded-index media can undergo closed Berry trajectories, yielding periodic vortex annihilations and revivals along the light-propagation direction. The vortex ... -
Vortex streets in walking parametric wave mixing
Molina Terriza, Gabriel; Torner Sabata, Lluís; Petrov, D V (1999-07)
Article
Accés restringit per política de l'editorialThe combined effects of diffraction and Poynting vector walk-off in second-harmonic generation with pump beams that contain screw phase dislocations is addressed for what is believed to be the first time. We predict the ...