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    Nondiffractive-nondiffusive beams in complex crystals  Open access

     Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    Physical review A
    Vol. 89, num. 6
    DOI: 10.1103/PhysRevA.89.063811
    Date of publication: 2014-06-16
    Journal article

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    The study of spatial dispersion of two-dimensional complex crystals, with periodic modulations of both gain-loss and the refractive index, reveals simultaneous nondiffractive-nondiffusive light propagation. Narrow light beams and light patterns propagate without dispersion while amplified through the complex material. We determine and explore nondiffractive-nondiffusive regimes for collinear and noncollinear propagation.

    The study of spatial dispersion of two-dimensional complex crystals, with periodic modulations of both gain-loss and the refractive index, reveals simultaneous nondiffractive-nondiffusive light propagation. Narrow light beams and light patterns propagate without dispersion while amplified through the complex material. We determine and explore nondiffractive-nondiffusive regimes for collinear and noncollinear propagation.

  • Beam shaping in two-dimensional metallic photonic crystals photonic crystals

     Kumar, Nikhil Pradeep; Maigyte, Lina; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis
    Journal of the Optical Society of America B. Optical physics
    Vol. 31, num. 4, p. 686-690
    DOI: 10.1364/JOSAB.31.000686
    Date of publication: 2014-03-05
    Journal article

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    We study light beam propagation in periodic metallic nanostructures¿metallic photonic crystals (MPhCs). In particular, we consider a two-dimensional rhombic array of metallic cylinders embedded in air and explore its ability to tailor spatial propagation of light beams. We show that the structure supports self-collimated propagation and negative (anomalous) diffraction. In this later case, flat lensing is observed, leading to the focusing of beams behind the MPhCs. Moreover, the anisotropic attenuation of light provided by the structure enables spatial filtering of noisy beams.

  • Simulations and analysis of beam quality improvement in spatially modulated broad area edge-emitting devices

     Radziunas, Mindaugas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    Semiconductor Lasers and Laser Dynamics
    DOI: 10.1117/12.2051909
    Presentation's date: 2014-04
    Presentation of work at congresses

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    We simulate and analyze how beam quality improves while being amplified in edge emitting broad area semiconductor amplifiers with a periodic structuring of the electrical contacts, in both longitudinal and lateral directions. A spatio-temporal traveling wave model is used for simulations of the dynamics and nonlinear interactions of the optical fields, induced polarizations and carrier density. In the case of small beam amplification, the optical field can be expanded into few Bloch modes, so that the system is described by a set of ODEs for the evolution of the mode amplitudes. The analysis of such model provides a deep understanding of the impact of the different parameters on amplification and on spatial (angular) filtering of the beam. It is shown that under realistic parameters the two-dimensional modulation of the current can lead not only to a significant reduction of the emission divergence, but also to an additional amplification of the emitted field

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    Flat lensing by periodic loss-modulated materials  Open access

     Kumar, Nikhil Pradeep; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    Journal of the Optical Society of America B. Optical physics
    Vol. 30, num. 10, p. 2684-2688
    DOI: 10.1364/JOSAB.30.002684
    Date of publication: 2013-09-23
    Journal article

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    We propose a flat lensing effect using a periodic loss-modulated material. In particular, we consider a two-dimensional square and rhombic arrangement of lossy cylinders embedded in a host media with the same refractive index. The effect is predicted by the dispersion curves obtained by a coupled mode expansion of Maxwell equations and by numerical beam propagation experiments. From both analytical and numerical studies, we show that, for a range of frequencies, light beams undergo negative diffraction on propagation through the loss-modulated medium, providing a window of high transmission. The phase shifts accumulated by negative diffraction within the structure are then compensated by normal diffraction, leading to substantial focalization beyond it.

    We propose a flat lensing effect using a periodic loss-modulated material. In particular, we consider a two-dimensional square and rhombic arrangement of lossy cylinders embedded in a host media with the same refractive index. The effect is predicted by the dispersion curves obtained by a coupled mode expansion of Maxwell equations and by numerical beam propagation experiments. From both analytical and numerical studies, we show that, for a range of frequencies, light beams undergo negative diffraction on propagation through the loss-modulated medium, providing a window of high transmission. The phase shifts accumulated by negative diffraction within the structure are then compensated by normal diffraction, leading to substantial focalization beyond it.

    Missatge de l'editor: This paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josab/abstract.cfm?uri=josab-30-10-2684. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

  • Unlocked evanescent waves in periodic structures

     Botey Cumella, Muriel; Cheng, Yu Chieh; Romero García, Vicenç; Pico Vila, Rubén; Herrero Simon, Ramon; Sánchez Morcillo, Victor José; Staliunas, Kestutis
    Optics letters
    Vol. 38, num. 11, p. 1890-1892
    DOI: 10.1364/OL.38.001890
    Date of publication: 2013-06-01
    Journal article

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    We predict the existence of evanescent modes with unlocked phases in two-dimensional (2D) dielectric periodic structures. Contrary to what is known for one-dimensional structures, where evanescent fields lock to the host modulation, we show that in 2D systems a new class of evanescent modes exists with an unlocked real part of the wave vector. Hence, beams constructed from such unlocked evanescent waves can exhibit spatial effects. A significant focalization of a beam propagating within the band gap of a flat photonic crystal slab is also shown. The predicted phenomenon is expected to be generic for spatially modulated materials.

  • Intrinsic beam shaping mechanism in spatially modulated broad area semiconductor amplifiers

     Radziunas, Mindaugas; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis
    Applied physics letters
    Vol. 103, num. 13, p. 132101-132101-4
    DOI: 10.1063/1.4821251
    Date of publication: 2013-09-23
    Journal article

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    We investigate beam shaping in broad area semiconductor amplifiers induced by a 2-dimensional (longitudinal and lateral) periodic modulation of the pump on a scale of several microns. The study is performed by solving numerically a (2¿+¿1)-dimensional model for the semiconductor amplifier. We show that, under realistic conditions, the anisotropic gain induced by the pump periodicity can show narrow angular profile of enhanced gain of less than 1°, providing an intrinsic filtering mechanism and eventually improving the spatial beam quality.

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    Control and enhancement of beam quality of broadarea semiconductor devices and arrays by multimode interference couplers and two-dimensional gain modulation  Open access

     Murad, M.; Sorel, M.; Herrero Simon, Ramon; Botey Cumella, Muriel; Marsh, J.H.; Staliunas, Kestutis
    High Power Diode Lasers and Systems Conference
    p. 8-9
    DOI: 10.1109/HPD.2013.6706592
    Presentation's date: 2013-10-16
    Presentation of work at congresses

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    It is proposed to control the beam quality of broad-area semiconductor devices by two-dimensional structuring enforcing phase coherence across the device. First results based on MMI couplers are presented.

    It is proposed to control the beam quality of broad-area semiconductor devices by two-dimensional structuring enforcing phase coherence across the device. First results based on MMI couplers are presented.

  • Negative diffraction by a periodically modulated loss

     Botey Cumella, Muriel; Kumar, Nikhil Pradeep; Herrero Simon, Ramon; Maigyte, Lina; Pico Vila, Rubén; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    p. 1-4
    DOI: 10.1109/ICTON.2013.6602994
    Presentation's date: 2013-06-26
    Presentation of work at congresses

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    We show how a periodic modulation of loss on the wavelength scale provides negative diffraction propagation. In particular, we consider a 2D square arrangement of lossy cylinders embedded in air, with no index contrast. The phase-shifts accumulated in propagation trough such a structure, with flat-flat interfaces, are then compensated by normal diffraction in air leading to a substantial focalization of a light beam behind the crystal. The transmitted light intensity map exhibits a window of high transmission as a result of anisotropic loss provided by the periodicity. The effect is accounted buy the dispersion curves obtained by a coupled mode expansion of Maxwell equations and numerical experiments. The predicted phenomenon is expected to be generic for spatially modulated materials, and indeed we show that the results can be extended to acoustics.

  • Theoretical study of beam quality improvement in spatially modulated broad area edge-emitting devices

     Radziunas, Mindaugas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    European Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
    DOI: 10.1109/CLEOE-IQEC.2013.6800767
    Presentation's date: 2013-05-12
    Presentation of work at congresses

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    Broad area (BA) lasers and amplifiers are robust, compact and highly efficient devices for generation of high power beams. These beams, however, suffer from a poor spatial and temporal beam quality. The stabilization and shaping of the optical beams in BA devices can be achieved, for example, by injection of the optical beam at some angle to the longitudinal axis [1], by the external optical feedback from the corresponding off-axis mirror [2], or by special geometry of the device [3].

  • Beam shaping in spatially modulated broad area semiconductor amplifiers

     Herrero Simon, Ramon; Botey Cumella, Muriel; Radziunas, Mindaugas; Staliunas, Kestutis
    European Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
    DOI: 10.1109/CLEOE-IQEC.2013.6801816
    Presentation's date: 2013-05-12
    Presentation of work at congresses

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    We propose and analyze a beam-shaping mechanism that in broad-area semiconductor amplifiers occurs due to spatial pump modulation on a micrometer scale. The study, performed under realistic parameters and conditions, predicts a spatial (angular) filtering of the radiation, which leads to a substantial improvement of the spatial quality of the beam during amplification. Quantitative analysis of spatial filtering performance is presented based on numerical integration of the paraxial propagation model and on analytical estimations.

  • Formation of X-pulses in periodically gain/loss modulated materials

     Loiko, Yury; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis
    Optics express
    Vol. 20, num. 10, p. 11271-11276
    DOI: 10.1364/OE.20.011271
    Date of publication: 2012-05-07
    Journal article

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  • Improving beam quality in broad area semiconductor amplifiers

     Herrero Simon, Ramon; Botey Cumella, Muriel; Kumar, Nikhil Pradeep; Staliunas, Kestutis
    Proceedings of SPIE, the International Society for Optical Engineering
    Vol. 8432, p. 1-7
    DOI: 10.1117/12.922849
    Date of publication: 2012
    Journal article

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  • About the oscillatory possibilities of the dynamical systems

     Herrero Simon, Ramon; Pi, F.; Rius, J.; Orriols Tubella, Gaspar
    Physica. D, Nonlinear phenomena
    Vol. 241, num. 16, p. 1358-1391
    DOI: 10.1016/j.physd.2012.05.001
    Date of publication: 2012-08-15
    Journal article

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  • Anisotropic subdiffractive solitons

     Herrero Simon, Ramon; Barashenkov, Igor V; Alexeeva, N.V.; Staliunas, Kestutis
    Chaos solitons and fractals
    Vol. 44, num. 12, p. 1070-1074
    DOI: 10.1016/j.chaos.2011.08.010
    Date of publication: 2012-12
    Journal article

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  • High-directional wave propagation in periodic loss modulated materials

     Kumar, Nikhil Pradeep; Botey Cumella, Muriel; Herrero Simon, Ramon; Loiko, Yury; Staliunas, Kestutis
    Photonics and nanostructures. Fundamentals and applications
    Vol. 10, num. 4, p. 644-650
    DOI: 10.1016/j.photonics.2012.06.003
    Date of publication: 2012-10
    Journal article

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    Beam shaping in spatially modulated broad-area semiconductor amplifiers  Open access

     Herrero Simon, Ramon; Botey Cumella, Muriel; Radziunas, Mindaugas; Staliunas, Kestutis
    Optics letters
    Vol. 37, num. 24, p. 5253-5255
    DOI: 10.1364/OL.37.005253
    Date of publication: 2012-12-15
    Journal article

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    We propose and analyze a beam-shaping mechanism that in broad-area semiconductor amplifiers occurs due to spatial pump modulation on a micrometer scale. The study, performed under realistic parameters and conditions, predicts a spatial (angular) filtering of the radiation, which leads to a substantial improvement of the spatial quality of the beam during amplification. Quantitative analysis of spatial filtering performance is presented based on numerical integration of the paraxial propagation model and on analytical estimations.

    We propose and analyze a beam-shaping mechanism that in broad-area semiconductor amplifiers occurs due to spatial pump modulation on a micrometer scale. The study, performed under realistic parameters and conditions, predicts a spatial (angular) filtering of the radiation, which leads to a substantial improvement of the spatial quality of the beam during amplification. Quantitative analysis of spatial filtering performance is presented based on numerical integration of the paraxial propagation model and on analytical estimations.

    Missatge de l'editor: "This paper was published in Optics letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-37-24-5253. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law."

  • Focusing of evanescent waves by modulated sonic structures

     Romero García, Vicenç; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Botey Cumella, Muriel; Herrero Simon, Ramon; Chung, Yu-Chieh; Staliunas, Kestutis
    Electrical Transport and Optical Properties of Inhomogeneous Media
    Presentation's date: 2012-09-04
    Presentation of work at congresses

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  • Spatial noise reduction in broad area semiconductors

     Herrero Simon, Ramon; Botey Cumella, Muriel; Kumar, Nikhil Pradeep; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    p. 1-4
    DOI: 10.1109/ICTON.2012.6254492
    Presentation's date: 2012
    Presentation of work at congresses

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  • Self-collimation and spatial filtering in 2D gain/loss periodic spatially modulated materials

     Botey Cumella, Muriel; Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon; Kumar, Nikhil Pradeep
    European Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
    p. EI.P.8 TUE
    DOI: 10.1109/CLEOE.2011.5942985
    Presentation's date: 2012-05-24
    Presentation of work at congresses

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  • Focalization of evanescent beams

     Botey Cumella, Muriel; Cheng, Yu Chieh; Herrero Simon, Ramon; Romero García, Vicenç; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    p. 1-3
    DOI: 10.1109/ICTON.2012.6253923
    Presentation's date: 2012
    Presentation of work at congresses

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    We predict and show the existence of unlocked evanescent waves in two dimensional periodic structures. In a one dimensional periodic structure an evanescent mode are located either at the center or at the boundary of the Brillouin Zone, and the real part of wave-vectors is locked either to zero or to the modulation vector of the periodicity. However, we report an unexpected observation that this is not the case in 2D or 3D PhCs where "unlocked" complex modes can be predicted. As an interesting consequence, due to their “complex” character, or, equivalently, due to their phase freedom, beams constructed from such evanescent waves can show focalization effects. Indeed, we numerically simulate the propagation of such beams in the bandgap of PhC slabs, and we find significant focalization.

  • Research activities of the group on nonlinear dynamics, nonlinear optics and lasers (DONLL) at the universitat politècnica de catalunya (Campus de Terrassa)

     Tiana Alsina, Jordi; Zamora Munt, Jordi; Nistor, Ioan Cristian; Roppo, Vito; Maigyte, Lina; Aragoneses Aguado, Andres; Khumar, N.P.; Martinez Gonzalez, Maria Cristina; Fernandez Soler, Juanjo; Serrat Jurado, Carles; Font Garcia, Josep Lluís; Herrero Simon, Ramon; Cojocaru, Crina Maria; Trull, Jose; Masoller Alonso, Cristina; Staliunas, Kestutis; Torrent Serra, Maria Del Carmen; Garcia Ojalvo, Jorge; Vilaseca Alavedra, Ramon
    Óptica pura y aplicada
    Vol. 44, num. 2, p. 219-225
    Date of publication: 2011-06
    Journal article

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  • Dispersion management in spatially modulated broad band semiconductors

     Herrero Simon, Ramon; Botey Cumella, Muriel; Khumar, N.P.; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    p. 1-4
    DOI: 10.1109/ICTON.2011.5971087
    Presentation's date: 2011
    Presentation of work at congresses

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  • Light in materials with periodic gain-loss modulation on a wavelength scale

     Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis
    Physical review A
    Vol. 82, num. 11
    DOI: 10.1103/PhysRevA.82.013828
    Date of publication: 2010-07-22
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  • Diffractive effects in 1D and 2D gain/loss periodic spatial modulated materials

     Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    p. 1-4
    DOI: 10.1109/ICTON.2010.5549259
    Presentation's date: 2010-06-28
    Presentation of work at congresses

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    The propagation of light through materials with periodically modulated gain can present different effects that are analyzed in the paper. The characterization of these gain/loss metamaterials (GLM) with a two-dimensional modulation predicts the mode locked states and effects like non diffractive propagation of beams, superlaminar light propagation regimes and superdiffusion due to angular gain dependence. The last allows the management of amplification and spatial frequency filtering altogether, obtaining amplified, cleaned and focalized beams at the output of these kind of gain modulated materials. The characterization is obtained from the full Maxwell equations using the plane wave expansion (PWE) method, propagation through a given direction is simulated considering beam propagation in the paraxial approximation.

  • Light propagation in 1D and 2D gain/loss periodic spatial modulated materials

     Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis
    International Conference on Photonic and Electromagnetic Crystal Structures
    p. 138
    Presentation's date: 2010-09-28
    Presentation of work at congresses

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  • Diffraction management and sub-diffractive solitons in periodically driven Bose¿Einstein condensates

     Staliunas, Kestutis; Herrero Simon, Ramon
    Physica. D, Nonlinear phenomena
    Vol. 238, num. 15, p. 1326-1337
    Date of publication: 2009-07
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    Gain/loss periodic spatial modulated materials on a wavelength scale  Open access

     Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon
    International Conference on Transparent Optical Networks
    p. 687-690
    DOI: 10.1109/ICTON.2009.5185101
    Presentation's date: 2009-01-01
    Presentation of work at congresses

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    We predict self-collimation and superdiffusion of light propagating in materials with periodically modulated gain/loss profile. The modulation is parallel and transverse to the light propagation direction and its periodicity is on the wavelength scale. The self-collimation (or diffraction-free propagation) of the beams is found, which is similar to that observed in photonic crystals. The superdiffusion is also predicted, which means a dependence of the beam amplification on the propagation direction, which results in the spatial frequency filtering of the beams. We justify the predictions by the numerical simulations of the paraxial wave propagation equations.

  • PROPIETATS DINÀMIQUES I NO LINIALS DE MATERIALS I SITEMES FOTÒNICS, ELÈCTRICS I BIOLÒGICS

     Roppo, Vito; Zamora Munt, Jordi; Tiana Alsina, Jordi; Sellarès González, Jordi; Pons Rivero, Antonio Javier; De Sancristobal Alonso, Belen; Espinar Calvo, Maria Lorena; Cojocaru, Crina Maria; Font Garcia, Josep Lluís; Vilaseca Alavedra, Ramon; Torrent Serra, Maria Del Carmen; Herrero Simon, Ramon; Trull, Jose; Aragoneses Aguado, Andres; Òrrit Prat, Jordi; Staliunas, Kestutis; Cañadas Lorenzo, Juan Carlos; Diego Vives, Jose Antonio; Domedel Puig, Nuria; Belana Punseti, Juan; Masoller Alonso, Cristina; Mudarra Lopez, Miguel; Nistor, Ioan Cristian; Garcia Ojalvo, Jorge
    Competitive project

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  • Subdiffraction and spatial filtering due to periodic spatial modulation of the gain-loss profile

     Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon
    Physical review A
    Vol. 80, num. 1, p. 3821
    Date of publication: 2009-07
    Journal article

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  • Research activities of the Group on Nonlinear Dynamics, Nonlinear Optics and Lasers (DONLL) at the Universitat Politència de Catalunya (Campus de Terrassa)

     Martínez, Cristina; Tiana Alsina, Jordi; Zamora Munt, Jordi; Nistor, Ioan Cristian; Roppo, Vito; Espinar Calvo, Maria Lorena; Fernandez Soler, Juanjo; Font Garcia, Josep Lluís; Cojocaru, Crina Maria; Trull, Jose; Herrero Simon, Ramon; Staliunas, Kestutis; Masoller Alonso, Cristina; Torrent Serra, Maria Del Carmen; Garcia Ojalvo, Jorge; Vilaseca Alavedra, Ramon
    Reunión Nacional de Óptica
    p. 15
    Presentation's date: 2009-09-14
    Presentation of work at congresses

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  • Second Harmonic Generation of Narrow Beams in Subdiffractive Photonic Crystals

     Nistor, Ioan Cristian; Cojocaru, Crina Maria; Loiko, Yury; Trull, Jose; Herrero Simon, Ramon; Staliunas, Kestutis
    Physical review A
    Vol. 78, p. 53818
    Date of publication: 2008-11
    Journal article

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  • Second harmonic generation of narrow beams in subdiffractive photonic crystals

     Staliunas, Kestutis; Cojocaru, Crina Maria; Trull, Jose; Herrero Simon, Ramon; Loiko, Yury
    10th International Conference on Transparent Networks/7th European Symposium on Photonic Crystals
    p. 7-8
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  • Broadband second harmonic parametric scattering in ferroelectric crystals with random domain structures

     Cojocaru, Crina Maria; Trull, Jose; Fischer, R; Saltiel, S; Krolikowski, W; Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon; Kivshar, Y
    10th International Conference on Transparent Networks/7th European Symposium on Photonic Crystals
    p. 80-83
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  • Second harmonic generation in ferroelectric crystals with disordered nonlinear domain structure

     Trull, Jose; Cojocaru, Crina Maria; Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon; Saltiel, S; Neshev, D; Krolikowski, W; Kivshar, Y
    Conferencia Española de Nanofotónica
    p. 171-172
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  • Second harmonic generation of narrow beams in subdiffractive photonic crystals

     Nistor, Ioan Cristian; Staliunas, Kestutis; Cojocaru, Crina Maria; Trull, Jose; Herrero Simon, Ramon
    Conferencia Española de Nanofotónica
    p. 169-170
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  • Efficient parametric amplification of narrow beams in photonic crystals

     Staliunas, Kestutis; Loiko, Yury; Herrero Simon, Ramon; Cojocaru, Crina Maria; Trull, Jose
    Optics letters
    Vol. 32, num. 14, p. 1992-1994
    Date of publication: 2007-07
    Journal article

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  • Towards observation of sub-diffractive pulse propagation in photonic crystals

     Loiko, Yury; Staliunas, Kestutis; Herrero Simon, Ramon; Cojocaru, Crina Maria; Trull, Jose; Sirutkaitis, Valdas; Faccio, D; Pertsch, And T
    Optics communications
    Vol. 279, num. 2, p. 377-383
    Date of publication: 2007-11
    Journal article

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  • Quantitative analysis of subdiffractive light propagation in photonic crystals

     Loiko, Yury; Serrat Jurado, Carles; Herrero Simon, Ramon; Staliunas, Kestutis
    Optics communications
    Vol. 269, num. 1, p. 128-136
    Date of publication: 2007-01
    Journal article

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  • Arresting soliton collapse in two-dimensional nonlinear Schrodinger systems via spatiotemporal modulation of the external potential

     Staliunas, Kestutis; Herrero Simon, Ramon; Valcarcel, De G J
    Physical review A
    Vol. 75, num. 1, p. 1-4
    Date of publication: 2007-01
    Journal article

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  • Ultrashort light pulses in photonic crystals in subdiffractive regimes

     Loiko, Yury; Herrero Simon, Ramon; Staliunas, Kestutis
    Journal of the Optical Society of America B. Optical physics
    Vol. 24, num. 7, p. 1639-1645
    Date of publication: 2007-07
    Journal article

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  • Broadband second harmonic parametric scattering in ferroelectric crystals with random domains structure

     Herrero Simon, Ramon
    Third 'Rio de la Plata' Workshop on Noise, Chaos and Complexity in Lasers and Nonlinear Optics
    Presentation's date: 2007-12-03
    Presentation of work at congresses

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  • Stable subdiffractive one- and two-dimensional spatial solitons in Kerr-nonlinear photonic crystals

     Herrero Simon, Ramon; Staliunas, Kestutis; Valcárcel, G de; Loiko, Yury; Trull, Jose; Cojocaru, Crina Maria; Nistor, Ioan Cristian
    Nonlinear effects in photonic materials
    p. 12
    Presentation of work at congresses

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  • Stable subdiffractive one- and two-dimensional spatial solitons in Kerr-nonlinear photonic crystals

     Herrero Simon, Ramon
    Nonlinear effects in photonic materials
    Presentation's date: 2007-04-13
    Presentation of work at congresses

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  • Broadband second harmonic parametric scattering in ferroelectric crystals with random domains structure

     Trull, Jose; Cojocaru, Crina Maria; Fischer, R; Saltiel, S M; Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon; Neshev, D N; Krolikowski, W; Kivshar, Y S
    Third 'Rio de la Plata' Workshop on Noise, Chaos and Complexity in Lasers and Nonlinear Optics
    p. 21
    Presentation of work at congresses

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  • Subdiffractive pulses in photonic crystals

     Staliunas, Kestutis; Loiko, Yury; Cojocaru, Crina Maria; Trull, Jose; Herrero Simon, Ramon
    Conference on Lasers and Electro-Optics/Europe
    Presentation of work at congresses

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  • Second-harmonic parametric scattering in ferroelectric crystals with disordered nonlinear domain structures

     Trull, Jose; Cojocaru, Crina Maria; Fischer, R; Saltiel, S M; Staliunas, Kestutis; Herrero Simon, Ramon; Vilaseca Alavedra, Ramon; Neshev, D N; Krolikowski, W; Kivshar, Y S
    Optics express
    Vol. 15, num. 24, p. 15868-15877
    Date of publication: 2007-11
    Journal article

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  • Subdiffractive light pulses in photonic crystals

     Staliunas, Kestutis; Serrat Jurado, Carles; Herrero Simon, Ramon; Cojocaru, Crina Maria; Trull, Jose
    Physical review E: statistical, nonlinear, and soft matter physics
    Vol. 74, p. 1-6
    Date of publication: 2006-07
    Journal article

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  • Nondiffractive propagation of light in photonic crystal

     Staliunas, Kestutis; Herrero Simon, Ramon
    Physical review E: statistical, nonlinear, and soft matter physics
    Vol. 73, num. 01, p. 016601-16606
    Date of publication: 2006-01
    Journal article

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  • Subdiffractive band-edge solitons in Bose-Einstein condensates in periodic potencials

     Staliunas, Kestutis; Herrero Simon, Ramon; Valcárcel, Germán J De
    Physical review E: statistical, nonlinear, and soft matter physics
    Vol. 73, p. 065603-65604
    Date of publication: 2006-06
    Journal article

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  • ACTIVELY INDUCED REFLECTION VIA A QUADRATIC NONLINEAR OPTICAL INTERACTION IN A SEMICONDUCTOR PHOTONIC CRYSTAL: APPLICATION TO ULTRA FAST ALL-OPTICAL MODULATION AND SWITCHING

     Cojocaru, Crina Maria; Trull, Jose; Herrero Simon, Ramon; Staliunas, Kestutis; Nistor, C
    Date of publication: 2006-06-30
    Book chapter

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