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Inverse-design of non-Hermitian potentials for on-demand asymmetric reflectivity
(2021-05-24)
Article
Open AccessWe 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
(Nature, 2021-04-19)
Article
Open AccessIdentifying, 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
(2021-03-16)
Article
Restricted access - publisher's policySpatial 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
(2021-04-01)
Article
Restricted access - publisher's policyThe 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
(American Physical Society (APS), 2021-03-01)
Article
Open AccessParity-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
(American Institute of Physics (AIP), 2021-02-12)
Article
Open AccessWe 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
(2015-03-01)
Article
Restricted access - publisher's policyPhotonic 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
(2021-03-15)
Article
Open AccessUnderstanding 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
(2021-01-20)
Article
Restricted access - publisher's policyUsing 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
(2020-07-15)
Article
Open AccessWe 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
(2020-10-07)
Article
Open AccessNon-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
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-12)
Article
Open AccessThis 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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