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    Type I and type II second harmonic generation of conically refracted beams  Open access

     Turpin, Alex; Loiko, Yury; Kalkandjiev, Todor K.; Trull, Jose; Cojocaru, Crina Maria; Mompart, Jordi
    Optics letters
    Date of publication: 2013-07-15
    Journal article

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    Type I and type II second harmonic generation (SHG) of a beam transformed by the conical refraction phenomenon are presented. We show that, for type I, the second harmonic intensity pattern is a light ring with a point of null intensity while, for type II, the light ring possesses two dark regions. Taking into account the different two-photon processes involved in SHG, we have derived analytical expressions for the resulting transverse intensity patterns that are in good agreement with the experimental data. Finally, we have investigated the spatial evolution of the second harmonic signals, showing that they behave as conically refracted beams

    Type I and type II second harmonic generation (SHG) of a beam transformed by the conical refraction phenomenon are presented. We show that, for type I, the second harmonic intensity pattern is a light ring with a point of null intensity while, for type II, the light ring possesses two dark regions. Taking into account the different two-photon processes involved in SHG, we have derived analytical expressions for the resulting transverse intensity patterns that are in good agreement with the experimental data. Finally, we have investigated the spatial evolution of the second harmonic signals, showing that they behave as conically refracted beams.

  • Beam focusing in reflection from flat chirped mirrors

     Cheng, Yu Chieh; Peckus, Martynas; Kicas, S.; Trull, Jose; Cojocaru, Crina Maria; Vilaseca Alavedra, Ramon; Drazdys, R.; Staliunas, Kestutis
    Physical review A
    Date of publication: 2013-04-15
    Journal article

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    We propose and show by proof-of-principle calculations and experiments that beam focusing and imaging can be obtained in reflection from a flat interface of a micromodulated dielectric structure. We show, in particular, that a one-dimensionally modulated and chirped structure can focus a beam, performing an imaging of a light pattern, i.e., can act as a transversely invariant flat focusing mirror. 2013 American Physical Society.

  • Flat lensing in the visible frequency range by woodpile photonic crystals

     Maigyte, Lina; Purlys, Vytautas; Trull, Jose; Peckus, Martynas; Cojocaru, Crina Maria; Gailevicius, Darius; Malinauskas, Mangirdas; Staliunas, Kestutis
    Optics letters
    Date of publication: 2013-07-15
    Journal article

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    We experimentally demonstrate full two-dimensional focalization of light beams at visible frequencies by a three-dimensional woodpile photonic crystal. The focalization (the flat lensing) with focal distances of the order of 50¿70 µm is experimentally demonstrated. Experimental results are compared with numerical calculations and interpreted by harmonic expansion studies.

  • Focussing by a flat woodpile 3D photonic crystal

     Maigyte, Lina; Cojocaru, Crina Maria; Purlys, Vytautas; Trull, Jose; Gailevicius, Darius; Peckus, Martynas; Malinauskas, Mangirdas; Staliunas, Kestutis
    European Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
    Presentation's date: 2013-05-15
    Presentation of work at congresses

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    In this paper we investigate spatial propagation effect behind the Photonic Crystal (PhC) with nontrivial dispersion properties, which leads to a near field focusing. We analyze and experimentally demonstrate full two-dimensional focus formation of light beams at visible frequencies behind the three-dimensional woodpile photonic crystal. Experimental results correspond well with numerical FDTD calculations as well as with the mode expansion studies. The focusing distance of 60-80 micrometers behind the crystal is obtained.

  • Managing light in nonlinear disordered media

     Cojocaru, Crina Maria; Trull, Jose; Roppo, Vito; Sheng, Y.; Krolikowski, W.
    International Conference on Transparent Optical Networks
    Presentation's date: 2013-06
    Presentation of work at congresses

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    We discuss different aspects of nonlinear effects in quadratic photonic structures with disordered domain distribution and random size. These kinds of materials with an irregular nonlinear multi-domain structure enables simultaneously phase matching mechanism of various parametric processes over an ultra-broad spectral range and in different spatial directions. The specific features of disordered domain structure greatly affect the emission pattern of the generated harmonics and thus. The recorded second harmonic pattern characterizes the size and degree of disorder in nonlinear photonic structures. On the other side, the transverse second harmonic generation, possible in these materials, provides a simple and robust single-shot method for ultrashort optical pulse characterization, which enables not only the estimation of the temporal width of the pulses but also the observation of their temporal evolution during propagation.

  • 3D woodpile photonic crystal for focusing of light beams

     Maigyte, Lina; Cojocaru, Crina Maria; Purlys, Vytautas; Trull, Jose; Gailevicius, Darius; Peckus, Martynas; Malinauskas, Mangirdas; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    Presentation's date: 2013-06-25
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  • Near field focusing of beams reflected by flat mirror

     Cheng, Yu Chieh; Kicas, S.; Peckus, Martynas; Trull, Jose; Cojocaru, Crina Maria; Drazdys, R.; Vilaseca Alavedra, Ramon; Staliunas, Kestutis
    Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference
    Presentation's date: 2013-05-13
    Presentation of work at congresses

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    We predict generally that narrow beams can focus in reflection from the flat interface photonic structures, and we demonstrate the effect experimentally in particular realization,i.e. in reflection from one-dimensional chirped mirror with flat surface.

  • Unified approach to Cerenkov second harmonic generation

     Roppo, Vito; Kalinowski, Ksawery; Sheng, Y.; Krolikowski, W.; Cojocaru, Crina Maria; Trull, Jose
    Optics express
    Date of publication: 2013-11-04
    Journal article

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    We discuss the effect of second harmonic generation via the Cerenkov-like process in nonlinear bulk media and waveguides. We show that in both schemes the Cerenkov harmonic emission represents in fact a nonlinear Bragg diffraction process. It is therefore possible, for the first time, to describe the bulk and waveguide Cerenkov emission uniformly by considering the spatial modulation of the second-order nonlinear polarization. This is also experimentally illustrated by studying the Cerenkov second harmonic generation at the boundary of a nonlinear quadratic medium via the total internal reflection inside the nonlinear crystal.

  • Manifestation of spatial filtering performed by 3D photonic crystals

     Maigyte, Lina; Trull, Jose; Cojocaru, Crina Maria; Gertus, T.; Peckus, Martynas; Staliunas, Kestutis; Sirutkaitis, Valdas
    SPIE Photonics Europe: Optics, Photonics, and Digital Technologies for Multimedia
    Presentation's date: 2012
    Presentation of work at congresses

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  • Woodpile photonic crystal for beam collimation

     Maigyte, Lina; Trull, Jose; Mizeikis, Vygantas; Malinauskas, Mangirdas; Juodkazis, S.; Cojocaru, Crina Maria; Rutkauskas, M.; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis
    SPIE Photonics Europe: Optics, Photonics, and Digital Technologies for Multimedia
    Presentation's date: 2012
    Presentation of work at congresses

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  • Collimation and imaging behind a woodpile photonic crystal

     Maigyte, Lina; Cojocaru, Crina Maria; Trull, Jose; Peckus, Martynas; Mizeikis, Vygantas; Malinauskas, Mangirdas; Rutkauskas, M.; Juodkazis, S.; Staliunas, Kestutis
    International Conference on Transparent Optical Networks
    Presentation's date: 2012
    Presentation of work at congresses

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  • Woodpile photonic crystal for beam collimation

     Maigyte, Lina; Trull, Jose; Mizeikis, Vygantas; Malinauskas, Mangirdas; Juodkazis, S.; Cojocaru, Crina Maria; Rutkauskas, M.; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis
    Proceedings of SPIE, the International Society for Optical Engineering
    Date of publication: 2012
    Journal article

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    Theoretical study of Cerenkov-type second-harmonic generation in periodically poled ferroelectric crystals  Open access

     Sheng, Yan; Kong, Qian; Roppo, Vito; Kalinowski, K.; Wang, Qi; Cojocaru, Crina Maria; Krolikowski, W.
    Journal of the Optical Society of America B. Optical physics
    Date of publication: 2012-03
    Journal article

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    We study theoretically the Čerenkov-type second-harmonic generation by a Gaussian beam in quadratic nonlinear media with periodically reverted ferroelectric domains. In particular, we consider the role of fundamental beam width on the harmonic emission process. We show that varying the beam width of the fundamental wave not only affects the strength of the emitted Čerenkov harmonic signal but also changes the sensitivity of the emission process to wavelength tuning.

  • Multi-directional Cerenkov second harmonic generation in two-dimensional nonlinear photonic crystal

     Sheng, Y.; Roppo, Vito; Ren, Mingliang; Kalinowski, K.; Cojocaru, Crina Maria; Trull, Jose; Li, Z.; Koynov, Kaloian; Krolikowski, W.
    Optics express
    Date of publication: 2012-02-13
    Journal article

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  • Manifestation of spatial filtering performed by 3D photonic crystals

     Maigyte, Lina; Gertus, T.; Peckus, Martynas; Trull, Jose; Cojocaru, Crina Maria; Staliunas, Kestutis; Sirutkaitis, Valdas
    Proceedings of SPIE, the International Society for Optical Engineering
    Date of publication: 2012-04-16
    Journal article

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  • CONTROL DE LA DIFRACCON DE LA LUZ EN MEDIOS MODULADOS

     Font Garcia, Josep Lluís; Vilaseca Alavedra, Ramon; Cojocaru, Crina Maria; Trull, Jose; Staliunas, Kestutis
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    Formation of collimated beams behind the woodpile photonic crystal  Open access

     Trull, Jose; Maigyte, Lina; Malinauskas, Mangirdas; Mizeikis, Vygantas; Juodkazis, Saulius; Cojocaru, Crina Maria; Rutkauskas, Marius; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis
    Physical review A
    Date of publication: 2011-09-09
    Journal article

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    We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input laser beam's focusing conditions, and we interpret theoretically the observed effect by calculating the spatial dispersion of propagation eigenmodes and by numerical simulation of paraxial propagation model.

    We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input laser beam’s focusing conditions, and we interpret theoretically the observed effect by calculating the spatial dispersion of propagation eigenmodes and by numerical simulation of paraxial propagation model.

  • Efficient generation of the second harmonic inhomogeneous component in opaque cavities

     Cojocaru, Crina Maria; Roppo, Vito; Raineri, F.; Trull, Jose; Chouteau, David; Sagnes, I.; Raj, R; Vilaseca Alavedra, Ramon; Scalora, M.
    International Conference on Transparent Optical Networks
    Presentation's date: 2011-06
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    Tailoring Cerenkov second-harmonic generation in bulk nonlinear photonic crystal  Open access

     Sheng, Yan; Roppo, Vito; Kong, Qian; Kalinowski, K.; Wang, Qi; Cojocaru, Crina Maria; Trull, Jose; Krolikowski, W.
    Optics letters
    Date of publication: 2011-07-01
    Journal article

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    We investigate theoretically the Čerenkov-type second-harmonic generation in two-dimensional bulk nonlinear photonic crystal with longitudinal modulation of the χ(2) nonlinearity. We show that in this scheme the Čerenkov radiation can be achieved simultaneously at multiple directions with comparable intensities. The angles of emission are controllable by the spatial modulation of the nonlinearity. We propose a design of the periodically poled domain pattern, which maximizes the efficiency of the second-harmonic emission.

  • Nonlinear frequency conversion under general phase mismatched condition: the role of phase locking and random nonlinear domains  Open access  awarded activity

     Roppo, Vito
    Defense's date: 2011-06-15
    Department of Applied Physics, Universitat Politècnica de Catalunya
    Theses

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    In the field of second harmonic (SH) generation most studies have been concerned with maximizing conversion efficiencies, generally achievable at the phase matching (PM) condition. Outside of the PM the conversion efficiency drastically decreases. This has caused that the possible working conditions out of PM to remain largely unexplored. In this thesis work we initiated a systematic study of the SH behavior in under conditions of large phase mismatch. When a pump pulse crosses an interface between a linear and a nonlinear medium there are always two generated SH components. These components may be understood on the basis of the mathematical solution of the inhomogeneous wave equations at the SH frequency. The homogeneous (HOM) solution is a component with wave-vector k(2¿) as expected from the dispersion relation and exchanges energy with the pump until the inevitable walk-off. The inhomogeneous (INH) solution is a component with a wave-vector 2k(¿), twice the pump wave-vector, and travels locked to the pump pulse. We divide our work in two parts, one for each generated component. Inhomogeneous component. We start a systematic study of the behavior of the generated INH component, phase locked to the pump. The consequences of phase locking (PL) can guide us towards new scenarios by allowing working conditions hitherto assumed inaccessible for absorbing materials. We show that while the HOM component travels with the group velocity given by material dispersion, the IHN component is captured by the pump pulse and experiences the same effective dispersion of the pump. It does not follow the PM condition. It naturally follows that the suppression of absorption at the SH wavelengths will occur if the pump is tuned to a region of transparency. We extended the same theory for the generated third harmonic (TH). We then studied the surprising behavior of SH and TH INH components with frequencies above the absorption edge when the material is placed inside a cavity resonant only at the fundamental frequency. We have shown that the PL mechanism not only inhibits absorption but also fosters the enhancement of harmonic generation by several orders of magnitude compared to the no-cavity case. Finally, we tested the INH SH and TH behaviors in metallic frequency regime of material. Homogeneous component. The techniques used to PM the nonlinear interaction enable efficient nonlinear interactions but drastically limit the spectral bandwidth of the nonlinear optical process, making the designed frequency converter only suitable for a fixed input wavelength and single interaction only. It has been shown that the use of disordered nonlinear media relaxes the PM condition thus allowing one to achieve relatively efficient broad bandwidth regime of the frequency conversion. An example of a quadratic nonlinear medium with a disordered domain structure is an un-poled Strontium Barium Niobate (SBN) crystal. It is composed of a system of random size anti parallel ferroelectric domains that allow to phase-match any second-order parametric process over a broad range of wavelengths without any poling. We have initiated an experimental and theoretical investigation of the properties of the SH waves generated in SBN crystals, with an extension to the generated TH. This study covers the coherence and polarization properties of the generated signal, as well as its spatial distribution. In addition, we have made an experimental study of the noncollinear interaction of short optical pulses in a SBN crystal by using two fundamental waves intersecting inside the crystal. We have shown that this effect may be employed as a simple tool for monitoring both the pulse duration and initial chirp. This method offers a simple and economic alternative to the existing methods for pulse characterization.

  • Second harmonic generation in sub-diffractive two-dimensional photonic crystals

     Nistor, Ioan Cristian
    Defense's date: 2011-01-26
    Department of Applied Physics, Universitat Politècnica de Catalunya
    Theses

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  • 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
    Date of publication: 2011-06
    Journal article

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    Enhanced efficiency of the second harmonic inhomogeneous component in an opaque cavity  Open access

     Roppo, Vito; Raineri, F.; Raj, R; Sagnes, I.; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.; Cojocaru, Crina Maria
    Optics letters
    Date of publication: 2011-05-15
    Journal article

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    In this Letter, we experimentally demonstrate the enhancement of the inhomogeneous second harmonic conversion in the opaque region of a GaAs cavity with efficiencies of the order of 0.1% at 612nm, using 3 ps pump pulses having peak intensities of the order of 10MW=cm2. We show that the conversion efficiency of the inhomogeneous, phase-locked second harmonic component is a quadratic function of the cavity factor Q.

  • Broadband third harmonic generation in quadratic media with disordered ferroelectric domains

     Kalinowski, K.; Roppo, Vito; Wang, W.; Neshev, Dragomir N.; Kong, Y.; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Krolikowski, W.; Kivshar, Yu.
    Nonlinear Photonics
    Presentation's date: 2010-06-21
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  • Second and third harmonic generation in disordered quadratic nonlinear media: application to short-pulse characterization

     Roppo, Vito; Wang, W.; Kalinowski, K.; Vilaseca Alavedra, Ramon; Trull, Jose; Cojocaru, Crina Maria; Staliunas, Kestutis; Krolikowski, W.; Kivshar, Yu.
    International Conference on Transparent Optical Networks
    Presentation's date: 2010-06-27
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  • Generation efficiency of the second harmonic inhomogeneous component

     Roppo, Vito; Cojocaru, Crina Maria; Trull, Jose; Raineri, F.; Chouteau, David; Sagnes, I.; Raj, R; Vilaseca Alavedra, Ramon; Scalora, M.
    European Optical Society Annual Meeting
    Presentation's date: 2010-10-26
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  • Second-harmonic generation in disordered quadratic media: role of a ferroelectric domain structure

     Roppo, Vito; Kalinowski, K.; Wang, W.; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.; Krolikowski, W.; Kivshar, Yu.
    International Conference on Transparent Optical Networks
    Presentation's date: 2010-06-27
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  • Second-harmonic generation in disordered quadratic media: role of a ferroelectric domain structure

     Roppo, Vito; Kalinowski, K.; Wang, W.; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.; Krolikowski, W.; Kivshar, Yu.
    Nonlinear Photonics
    Presentation's date: 2010-06-21
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  • The role of ferroelectric domain structure in second harmonic generation in random quadratic media

     Roppo, Vito; Wang, W.; Kalinowski, K.; Kong, Y.; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.; Krolikowski, W.; Kivshar, Yu.
    Optics express
    Date of publication: 2010
    Journal article

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  • Cavity behavior of second and third harmonic inhomogeneous solutions of Maxwell¿s equations

     Roppo, Vito; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.
    Waves in random and complex media
    Date of publication: 2010
    Journal article

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    We study second and third harmonic generation of ultrashort pulses in a cavity environment and focus on the role of a phase locking phenomenon that causes the pump to trap and drag the generated harmonic fields. The results reveal strong field localisation and resonance conditions for the phase locked components, which are tuned in a spectral region of huge nominal material absorption. This unique behavior suggests the possibility of new optical phenomena and new applications for opaque materials (i.e. semiconductors) in the visible and UV ranges, such as new laser sources with relatively high conversion efficiencies.

  • Signatures of light-beam spatial filtering in a three-dimensional photonic crystal

     Maigyte, Lina; Gertus, T.; Peckus, Martynas; Trull, Jose; Sirutkaitis, Valdas; Cojocaru, Crina Maria; Staliunas, Kestutis
    Physical review A
    Date of publication: 2010-08-13
    Journal article

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  • Phase locked second and third harmonic localization in semiconductor cavities

     Roppo, Vito; Cojocaru, Crina Maria; D'Aguanno, G.; Raineri, F.; Trull, Jose; Halioua, Y.; Vilaseca Alavedra, Ramon; Raj, R; Scalora, M.
    Journal of optoelectronics and advanced materials
    Date of publication: 2010-01
    Journal article

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  • Broad angle phase matching in subdiffractive photonic crystals

     Nistor, Ioan Cristian; Cojocaru, Crina Maria; Trull, Jose; Staliunas, Kestutis
    Optics communications
    Date of publication: 2010-09-15
    Journal article

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  • Second harmonic generation in a generic negative index medium

     Roppo, Vito; Ciraci, C.; Cojocaru, Crina Maria; Scalora, M.
    Journal of the Optical Society of America B. Optical physics
    Date of publication: 2010-08
    Journal article

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  • Second- and third-harmonic parametric scattering in disordered quadratic media

     Wang, W.; Kalinowski, K.; Roppo, Vito; Sheng, Yan; Koynov, Kaloian; Kong, Y.; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Krolikowski, W.
    Journal of physics B. Atomic molecular and optical physics
    Date of publication: 2010
    Journal article

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  • Lossless backward second-harmonic generation of extremely narrow subdiffractive beams in two-dimensional photonic crystals

     Nistor, Ioan Cristian; Cojocaru, Crina Maria; Karle, T. J.; Raineri, F.; Trull, Jose; Raj, R; Staliunas, Kestutis
    Physical review A
    Date of publication: 2010
    Journal article

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  • Broadband phase-matched second harmonic generation for narrow beams in planar two-dimensional photonic crystals

     Nistor, Ioan Cristian; Cojocaru, Crina Maria; Trull, Jose; Staliunas, Kestutis
    Proceedings of SPIE, the International Society for Optical Engineering
    Date of publication: 2010-05-13
    Journal article

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  • Characterization of femtosecond pulses via transverse second-harmonic generation in random nonlinear media

     Trull, Jose; Saltiel, S; Roppo, Vito; Cojocaru, Crina Maria; Dumay, D; Krolikowski, W; Neshev, Dn; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Kivshar, Ys
    Applied physics B. Lasers and optics
    Date of publication: 2009-06
    Journal article

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  • Femtosecond pulse duration measurement by transverse second harmonic generation in random nonlinear media

     Vilaseca Alavedra, Ramon; Roppo, Vito; Trull, Jose; Cojocaru, Crina Maria; Staliunas, Kestutis; Dumay, David; Krolikowski, W.; Saltiel, Salomon M.; Neshev, Dragomir N.; Kivshar, Yu.
    Nonlinear Optics: Materials, Fundamentals and Applications
    Presentation's date: 2009-07-12
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  • The role of the phase locking phenomenon in the second and third harmonics cavity localization

     Roppo, Vito; Cojocaru, Crina Maria; D'Agunaro, G.; Ranieri, F.; Raj, R.; Trull, Jose; Vilaseca Alavedra, Ramon; Scalora, M.
    OSA Annual Meeting
    Presentation's date: 2009-10-11
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  • Phase locked second harmonic etalon localization

     Roppo, Vito; D'Aguanno, G.; Cojocaru, Crina Maria; Raineri, F.; Trull, Jose; Vilaseca Alavedra, Ramon; Raj, R; Scalora, M.
    European Conference on Lasers and Electro-Optics / European Quantum Electronics Conference
    Presentation's date: 2009-06-14
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  • The effect of domain distribution on second harmonic generation in disordered nonlinear media

     Roppo, Vito; Saltiel, Salomon M.; Wang, W.; Kalinowski, K.; Trull, Jose; Cojocaru, Crina Maria; Neshev, Dragomir N.; Krolikowski, W.; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Kivshar, Yu.
    OSA Annual Meeting
    Presentation's date: 2009-10-11
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  • Third-harmonic generation via broadband cascading in disordered quadratic nonlinear media

     Wang, W.; Roppo, Vito; Kalinowski, K.; Kong, Y.; Neshev, Dn; Cojocaru, Crina Maria; Trull, Jose; Vilaseca Alavedra, Ramon; Staliunas, Kestutis; Krolikowski, W; Saltiel, S M; Kivshar, Y
    Optics express
    Date of publication: 2009
    Journal article

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  • Field localization and enhancement of phase-locked second- and third-order harmonic generation in absorbing semiconductor cavities

     Roppo, Vito; Cojocaru, Crina Maria; Raineri, F; D'Aguanno, G.; Trull, Jose; Halioua, Y.; Sagnes, I.; Vilaseca Alavedra, Ramon; Scalora, M.
    Physical review. A, general physics
    Date of publication: 2009-10
    Journal article

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  • ONDAS DE LUZ EN MEDIOS LINIALES Y NOLIANIALES MODULADOS EN EL ESPACIO

     Vilaseca Alavedra, Ramon; Font Garcia, Josep Lluís; Cojocaru, Crina Maria; Trull, Jose; Staliunas, Kestutis
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  • PROPIETATS DINÀMIQUES I NO LINIALS DE MATERIALS I SITEMES FOTÒNICS, ELÈCTRICS I BIOLÒGICS

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  • Phase Locked Harmonics Etalon Localization in Opaque Materials

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    International Conference on Transparent Optical Networks
    Presentation's date: 2009
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  • Phase matched second harmonic generation in planar two-dimensional photonic crystals

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    Journal of optics A. Pure and applied optics
    Date of publication: 2009-11
    Journal article

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  • Phase locked harmonic localization and enhancement in an absorbing semiconductor cavity

     Roppo, Vito; Cojocaru, Crina Maria; D'Aguanno, G.; Raineri, F.; Trull, Jose; Halioua, Y.; Vilaseca Alavedra, Ramon; Raj, R; Scalora, M.
    Proceedings of SPIE, the International Society for Optical Engineering
    Date of publication: 2009
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  • Planar second-harmonic generation with noncollinear pumps in disordered media

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    Optics express
    Date of publication: 2008-08
    Journal article

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