Recent Submissions

  • Inverse-design of non-Hermitian potentials for on-demand asymmetric reflectivity 

    Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2021-05-24)
    Article
    Open Access
    We propose a genetic algorithm-assisted inverse design approach to achieve ‘ondemand’ light transport in periodic and non-periodic planar structures containing dielectric and gain-loss layers. The optimization algorithm ...
  • Fast and effective pseudo transfer entropy for bivariate data-driven causal inference 

    Silini, Riccardo; Masoller Alonso, Cristina (Nature, 2021-04-19)
    Article
    Open Access
    Identifying, from time series analysis, reliable indicators of causal relationships is essential for many disciplines. Main challenges are distinguishing correlation from causality and discriminating between direct and ...
  • Nanostructured multilayer coatings for spatial filtering 

    Grineviciute, Lina; Babayigit, Ceren; Gailevicius, Darius; Peckus, Martynas; Turduev, Mirbek; Tolenis, Tomas; Vengris, Mikas; Kurt, Hamza; Staliunas, Kestutis (2021-03-16)
    Article
    Restricted access - publisher's policy
    Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such ...
  • Influence of Madden–Julian Oscillation on extreme rainfall events in Spring in southern Uruguay 

    Ungerovich, Matilde; Barreiro Parrillo, Marcelo; Masoller Alonso, Cristina (2021-04-01)
    Article
    Restricted access - publisher's policy
    The influence of Madden–Julian Oscillation (MJO) on the dynamics ofextreme rainfall events during austral Spring in Uruguay is investigated. Theresearch is focused on the southern region of the country, which includes15 ...
  • PT-symmetric Helmholtz resonator dipoles for sound directivity 

    Magariyachi, Tetsu; Arias Casals, Helena; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (American Physical Society (APS), 2021-03-01)
    Article
    Open Access
    Parity-time ( PT )-symmetric or, more generally, non-Hermitian systems have opened a new area for unconventional management of waves, with significant applications, especially in optics. However, fewer proposals are found ...
  • Reversible self-replication of spatiotemporal Kerr cavity patterns 

    Benadouda Ivars, Salim; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Conejero Casares, José Alberto; Milian Enrique, Carles (American Institute of Physics (AIP), 2021-02-12)
    Article
    Open Access
    We uncover a novel and robust phenomenon that causes the gradual self-replication of spatiotemporal Kerr cavity patterns in cylindrical microresonators. These patterns are inherently synchronized multifrequency combs. Under ...
  • Spatial filtering with photonic crystals 

    Maigyte, Lina; Staliunas, Kestutis (2015-03-01)
    Article
    Restricted access - publisher's policy
    Photonic crystals are well known for their celebrated photonic band-gaps-the forbidden frequency ranges, for which the light waves cannot propagate through the structure. The frequency (or chromatic) band-gaps of photonic ...
  • Harmonic generation from gold nanolayers: bound and hot electron contributions to nonlinear dispersion 

    Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Cojocaru, Crina; Akozbek, Neset; Ceglia, Domenico de; Vincenti, M. A.; Scalora, Michael (2021-03-15)
    Article
    Open Access
    Understanding how light interacts with matter at the nanoscale is pivotal if one is to properly engineer nano-antennas, filters and other devices whose geometrical features approach atomic size. We report experimental ...
  • Localized Core Four-Wave Mixing Buildup in the X-ray Spectrum of Chemical Species 

    Serrat Jurado, Carles (2021-01-20)
    Article
    Restricted access - publisher's policy
    Using the Kohn–Sham density functional theory, we numerically study the four-wave mixing response of a carbon atom model system exposed to a train of femtosecond two color ω–3ω random phase coherent X-ray pulses near the ...
  • Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals 

    Cojocaru, Crina; Trull Silvestre, José Francisco; Romero Muñiz, Rosa María; Sola Larrañaga, Iñigo Juan (2020-07-15)
    Article
    Open Access
    We demonstrate a novel dispersion-scan (d-scan) scheme for single-shot temporal characterization of ultrashort laser pulses. The novelty of this method relies on the use of a highly dispersive crystal featuring antiparallel ...
  • Restricted Hilbert Transform for Non-Hermitian Management of Fields 

    Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2020-10-07)
    Article
    Open Access
    Non-Hermitian systems exploiting the synergy between the properties of closed-conservative systems and open-dissipative (gain-loss) systems have recently become the playground to uncover unusual physical phenomena. Indeed, ...
  • Estimation of wave period from pitch and roll of a lidar buoy 

    Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco; Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-12)
    Article
    Open Access
    This work proposes a new wave-period estimation (L-dB) method based on the power-spectral-density (PSD) estimation of pitch and roll motional time series of a Doppler wind lidar buoy under the assumption of small angles ...

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