Ara es mostren els items 67-86 de 413

    • Efficiency of quadratic soliton generation 

      López Lago, Elena; Simos, Christos; Couderc, Vincent; Barthélémy, Alain; Artigas García, David; Torner Sabata, Lluís (2001-08)
      Article
      Accés restringit per política de l'editorial
      We report what is believed to be the first experimental demonstration of soliton content as a function of the intensity of input light for multicolor quadratic solitons. Experiments were conducted with spatial solitons ...
    • Efficiency-enhanced soliton optical parametric amplifier 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Torner Sabata, Lluís; Fejer, M M (2002-06)
      Article
      Accés restringit per política de l'editorial
      We show that the pump–to–signal power conversion efficiency of parametric chirped-pulse amplifiers made with periodically poled materials operating with multicolor spatial solitons can be significantly enhanced by employing ...
    • Eigenvalue control and switching by fission of multisoliton bound states in planar waveguides 

      Aleshkevich, V A; Kartashov, Yaroslav V.; Zelenina, A S; Vysloukh, Victor A.; Pérez Torres, Juan; Torner Sabata, Lluís (2004-03)
      Article
      Accés restringit per política de l'editorial
      We report the results of numerical studies of the fission of ¿-soliton bound states at the interface formed by a Kerr nonlinear medium and a linear dielectric in a planar waveguide. A variety of effects are shown to occur, ...
    • Elliptical light bullets 

      Mihalache, Dumitru; Mazilu, D; Dorring, J; Torner Sabata, Lluís (1999-01)
      Article
      Accés restringit per política de l'editorial
      We address the existence and properties of three-dimensional solitons localized in space and time, or light bullets, in bulk dispersive quadratic nonlinear media under conditions for Type I second-harmonic generation, with ...
    • Engineerable generation of quadratic solitons in synthetic phase-matching 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Torner Sabata, Lluís; Schiek, R (2000-09)
      Article
      Accés restringit per política de l'editorial
      We show that the efficiency and the mismatch bandwidth of quadratic soliton formation under conditions of second-harmonic generation can be enhanced in an important way in synthetic phase-matching profiles. Soliton excitation ...
    • Engineered nonlinear lattices 

      Clausen, C B; Christiansen, P L; Torner Sabata, Lluís; Gaididei, Y B (1999-11)
      Article
      Accés restringit per política de l'editorial
      We show that with the quasi-phase-matching technique it is possible to fabricate stripes of nonlinearity that trap and guide light like waveguides. We investigate an array of such stripes and find that when the stripes are ...
    • Engineering competing nonlinearities 

      Bang, O; Clausen, C B; Christiansen, P L; Torner Sabata, Lluís (1999-10)
      Article
      Accés restringit per política de l'editorial
      Weak modulation of a quasi-phase-matching (QPM) grating opens possibilities for engineering both the average quadratic nonlinearity and the incoherent average cubic nonlinearity induced by QPM. The relative strength of the ...
    • Engineering of effective quadratic and cubic nonlinearities in two-period QPM gratings 

      Bang, O; Clausen, Carl B.; Torner Sabata, Lluís (OPTICAL SOCIETY OF AMERICA, 2000)
      Text en actes de congrés
      Accés obert
      Summary form only given. Quasi-phase-matching (QPM) by electric-field poling in ferro-electric materials, such as LiNbO/sub 3/, is promising due to the possibilities of engineering the photolithographic mask, and thus the ...
    • Engineering of multicolor spatial solitons with chirped-period quasi-phase-matching gratings in optical parametric amplification 

      Schober, A M; Fejer, M M; Carrasco, S; Torner Sabata, Lluís (2005-08)
      Article
      Accés restringit per política de l'editorial
      We demonstrate the excitation of solitons in a parametric amplifier with enhanced signal content through the use of a chirped-period quasi-phase-matching grating. This technique affords a low soliton threshold at the input ...
    • Engineering of spatial solitons in two-period QPM structures 

      Johansen, S K; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís; Bang, O (2002-08)
      Article
      Accés restringit per política de l'editorial
      We report on a scheme which might make it practically possible to engineer the effective competing nonlinearities that on average govern the light propagation in quasi-phase-matching (QPM) gratings. Modulation of the QPM ...
    • Engineering soliton nonlinearities: from local to strongly nonlocal 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2009-01)
      Article
      Accés restringit per política de l'editorial
      We put forward what we believe to be a novel strategy to achieve synthetic nonlinearities where local and nonlocal contributions compete on a similar footing, thus yielding intermediate tunable responses ranging from local ...
    • Engineering the frequency correlations of entangled two-photon states by achromatic phase-matching 

      Pérez Torres, Juan; Macia, F; Carrasco, S; Torner Sabata, Lluís (2005-02)
      Article
      Accés restringit per política de l'editorial
      We put forward a new method to control the spectra of photon pairs generated in parametric downconversion that allows their spectral properties to be tuned from correlation to anticorrelation, including uncorrelation. The ...
    • Enhaced soliton interactions by inhomogeneous nonlinearity and nonlocality (artno 33812) 

      Ye, F; Kartashov, Yaroslav V.; Torner Sabata, Lluís (2007-09)
      Article
      Accés restringit per política de l'editorial
      Ocean waves are complex and often turbulent. While most ocean-wave interactions are essentially linear, sometimes two or more waves interact in a nonlinear way. For example, two or more waves can interact and yield waves ...
    • Enhanced localization of Dyakonov-like surface waves in left-handed materials 

      Crasovan, L C; Takayama, Osamu; Artigas García, David; Johansen, S K; Mihalache, Dumitru; Torner Sabata, Lluís (2006-10)
      Article
      Accés restringit per política de l'editorial
      We address the existence and properties of hybrid surface waves forming at interfaces between left-handed materials and dielectric birefringent media. The existence conditions of such waves are found to be highly relaxed ...
    • Enhancement and inhibition of light tunneling mediated by resonant mode conversion 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2014-02-15)
      Article
      Accés restringit per política de l'editorial
      We show that the rate at which light tunnels between neighboring multimode waveguides can be drastically increased or reduced by the presence of small longitudinal periodic modulations of the waveguide properties that ...
    • Enhancing the axial resolution of quantum optical coherence tomography by chirped QPM 

      Carrasco, S; Pérez Torres, Juan; Torner Sabata, Lluís; Sergienko, A; Saleh, B E A; Teich, M C (2004-10)
      Article
      Accés restringit per política de l'editorial
      We show theoretically that a chirped quasi-phase-matching nonlinear crystal structure can significantly enhance the axial resolution in quantum optical coherence tomography by increasing the spectral width of the generated ...
    • Estudio teórico de una unión Y activa para aplicaciones en dispositivos de óptica integrada 

      Recolons Martos, Jaume; Torner Sabata, Lluís; Canal Bienzobas, Fernando (1988)
      Text en actes de congrés
      Accés obert
    • Evolution dynamics of discrete-continuous light bullets 

      Eilenberger, F.; Minardi, Stefano; Szameit, Alexander; Roepke, Ulrich; Kobelke, J.; Schuster, K.; Bartelt, H.; Nolte, Stefan; Torner Sabata, Lluís; LEDERER, FALK; Tünnermann, Andreas; Pertsch, T. (2011-07-29)
      Article
      Accés restringit per política de l'editorial
      We experimentally and numerically investigate the propagation of light bullets (LBs) excited in two-dimensional fiber arrays. The combination of nonlinear self-frequency shift, wavelength dependence of thedispersion, and ...
    • Excitation of solitons with cascaded x(2) nonlinearities 

      Torner Sabata, Lluís; Menyuk, Curtis; Stegeman, George (1994-10)
      Article
      Accés restringit per política de l'editorial
      Mutual trapping of the fundamental and second-harmonic waves propagating in a material with cascaded second-order nonlinearity is investigated. Formation of solitonlike waves under a variety of excitation conditions is ...
    • Existence loci of bound states in the continuum in the parameter space of anisotropic planar structures 

      Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (Optical Society of American (OSA), 2019)
      Comunicació de congrés
      Accés obert
      Bound states in the continuum (BICs), first predicted in the field of quantum physics [1], are localized radiationless states existing in the part of the spectrum that corresponds to radiative modes. BICs are a general ...