Recent Submissions

  • Large nonlinear efficiency enhancement in the visible and UV range from plasmonic gold nanogratings 

    Cojocaru, Crina; Mukhopadhyay, Shroddha; Rodríguez Suñé, Laura; Vicenti, Maria Antonietta; Vilaseca Alavedra, Ramon; Scalora, Michael; Trull Silvestre, José Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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    We report a combined experimental/theoretical investigation on second and third harmonic generation from a plasmonic gold nanograting, that exhibits a plasmonic resonance in the near IR. The intense field localization leads ...
  • Self-cleaning in non-Hermitian linear multimode fibers 

    Akhter, Mohammad Nayeem; Herrero Simon, Ramon; Staliunas, Kestutis; Botey Cumella, Muriel (Institute of Electrical and Electronics Engineers (IEEE), 2023)
    Conference report
    Open Access
    We propose a self-cleaning mechanism in linear non-Hermitian graded index multimode fibers. The proposal is based a unidirectional coupling among transverse modes, induced by the introduction of a non-Hermitian potential, ...
  • Non-Hermitian light control in periodically modulated multimode fibers 

    Akhter, Mohammad Nayeem; Benadouda Ivars, Salim; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (2023)
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    We propose a new light management mechanism in graded index (GRIN) multimode fibers (MMFs) that allow to control the spectral mode distribution of the propagated beam. The effect is achieved through longitudinal non-Hermitian ...
  • Light control by scattering cancellation in ordered and disordered non-Hermitian media, direct and inverse design 

    Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2023)
    Conference report
    Open Access
    Non-Hermitian Physics has emerged as a fertile ground for a smart control of waves. Here, we present direct and inverse-design strategies to achieve ‘on demand’ dynamical manipulation of light by non-Hermitian potentials. ...
  • Rotating acoustic drills by the interference of detuned vortices 

    Jimenez, Noe; González Mateo, Enrique; Camarena, Francisco; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2022)
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    We present acoustic drill beams, structured sound beams exhibiting a dynamic intensity distribution that matches the shape of a helix. The intensity distribution rotates along the beam axis with controlled direction and ...
  • Fano-like resonances in modulated single-layers for angular and frequency selectivity of light 

    Nikitina, Julianija; Babayigit, Ceren; Staliunas, Kestutis; Grineviciute, Lina (2022)
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    This study was aimed to investigate the growth process of thin films on a pre-structured surface using different optically transparent materials and their optical properties. As results of conformal deposition of ion beam ...
  • Photonic crystals for suppression of filamentation 

    Aleksandravicius, Edvinas; Gailevicius, Darius; Dubietis, Audrius; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
    Conference report
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    In this work we show the prospect of using periodic refractive index modulation – photonic crystals – to control the spatial dispersion curvature in a way that could potentially counteract the Kerr effect, thus suppressing ...
  • Dynamic higher-order Bessel-Gauss beam interference generation of rotating beams 

    Kontenis, Gabrielius; Gailevicius, Darius; Jiménez, Noé; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
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    One of the key trends in laser material processing is the usage of structured laser beams. One such example is the Bessel beam with an elongated focal area and self-healing properties. Higher-order Bessel beams can be ...
  • Spatial filter realized by dielectrice waveguides 

    Lukošiunas, Ignas; Gailevicius, Darius; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
    Conference report
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    In this work, we introduce a spatial filtering mechanism that can be effectively utilized by photonic crystals. The phenomenon utterly expressed here is Rayleigh-Wood’s anomaly. Such a mechanism is realized and optimized ...
  • Modes in microchip lasers 

    Plukys, Matas; Gaizauskas, Eugenijus; Gailevicius, Darius; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
    Conference report
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    The transverse modes in microchip lasers (MCL) appear different from the classical mode theory, as the resonator consists of a set of plane mirrors (similar to semiconductor edge-emitting lasers and VCSELs). Then the ...
  • Non-Hermitian coupled semiconductor laser array 

    Herrero Simon, Ramon; Medina Pardell, Judith; Botey Cumella, Muriel; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
    Conference report
    Open Access
    We propose and explore a stabilization mechanism of a semiconductor laser array based on asymmetric coupling between neighboring lasers. The stabilization scheme takes advantage of the symmetry breaking of non-Hermitian ...
  • Direct- and Inverse-design for non-Hermitian smart light management 

    Botey Cumella, Muriel; Ahmed, Waqas W.; Herrero Simon, Ramon; Staliunas, Kestutis (META Conference, 2022)
    Conference report
    Open Access
    We present direct and inverse-design strategies to achieve ‘on demand’ dynamical manipulation of light by non-Hermitian potentials. The direct approach, based on a generalized Hilbert Transform, widens the concept of the ...

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