Listar por autoría "997296ca-81b0-4432-a36f-4b95ae60a185"
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Acoustic anomalous reflectors based on diffraction grating engineering
American Physical Society (2018)We present an efficient method for the design of anomalous reflectors for acoustic waves. The approach is based on the fact that the anomalous reflector is actually a diffraction grating in which the amplitude of all ... -
Analytical modeling of one-dimensional resonant asymmetric and reciprocal acoustic structures as Willis materials
IOP Publishing (2021-05-14)As building blocks of acoustic metamaterials, resonant scatterers have demonstrated their ability to modulate the effective fluid parameters, which subsequently possess extreme properties such as negative bulk modulus or ...
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Bound states in the continuum in circular clusters of scatterers
American Physical Society (2023-02-21)In this work, we study the localization of flexural waves in highly symmetric clusters of scatterers. It is shown that when the scatterers are placed regularly in the perimeter of a circumference the quality factor of the ...
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Broadband Asymmetric Propagation in Pillared Meta-Plates
MDPI (2020)The asymmetric propagation of mechanical energy across interfaces is a challenging problem with a wide range of applications. In this work, we present a novel structure presenting the asymmetric propagation of elastic waves ...
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Coupling Helmholtz resonators for sound manipulation
IEEE (2021-09-20)In this work, we discuss the interaction between Helmholtz resonators, using the finite element method. We show that the coupling between two spheres gives rise to two resonant modes at low frequencies. One is symmetric ...
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Dipolar localization of waves in twisted phononic crystal plates
American Physical Society (2021-01-11)The localization of waves in two-dimensional clusters of scatterers arranged in relatively twisted lattices is studied by multiple scattering theory. It is found that, for a given frequency, it is always possible to nd ...
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Direct retrieval method of the effective permittivity and permeability of bulk semi-infinite metamaterials by variable-angle spectroscopic ellipsometry
OSA Publishing (2019)In this work, we present a simple method for the direct retrieval of the effective permittivity and permeability of a bulk semi-infinite metamaterial from variable-angle spectroscopic ellipsometry measurements. Starting ...
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Edge modes for flexural waves in quasi-periodic linear arrays of scatterers
American Institute of Physics (2021-08-13)We present a multiple scattering analysis of robust interface states for flexural waves in thin elastic plates. We show that finite clusters of linear arrays of scatterers built on a quasi-periodic arrangement support ...
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Engineered Diffraction Gratings for Acoustic Cloaking
American Physical Society (2019)We show that engineered diffraction gratings can considerably simplify the design of acoustic ground cloaking devices. Acoustic reflecting gratings are designed in such a way that all the incident energy is channeled ...
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Far-field perfect imaging with time-modulated gratings
American Physical Society (2022-06-22)We study the capabilities of time-modulated diffraction gratings as imaging devices. It is shown that a time-dependent but transversally homogeneous slab can be used to make a perfect image of an object in the far-field, ...
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Generalized elastodynamic model for nanophotonics
American Physical Society (2020)A self-consistent theory for the classical description of the interaction of light and matter at the nanoscale is presented, which takes into account spatial dispersion. Up to now, the Maxwell equations in nanostructure ...
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Gradient index phononic crystals and metamaterials
De Gruyter (2019)Phononic crystals and acoustic metamaterials are periodic structures whose effective properties can be tailored at will to achieve extreme control on wave propagation. Their refractive index is obtained from the ...
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High-quality resonances in quasi-periodic clusters of scatterers for flexural waves
American Institute of Physics (2022-07-04)Multiple scattering theory is applied to the study of clusters of point-like scatterers attached to a thin elastic plate and arranged in quasi-periodic distributions. Two types of structures are specifically considered: ...
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Homogenization of piezoelectric planar Willis materials undergoing antiplane shear
Elsevier (2021-10-09)Homogenization theories provide models that simplify the constitutive description of heterogeneous media while retaining their macroscopic features. These theories have shown how the governing fields can be macroscopically ...
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Intelligent on-demand design of phononic metamaterials
De Gruyter (2022-01-04)With the growing interest in the field of artificial materials, more advanced and sophisticated functionalities are required from phononic crystals and acoustic metamaterials. This implies a high computational effort and ...
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Inverse design of topological metaplates for flexural waves with machine learning
Elsevier Ltd. (2020-12-08)The mechanical analog to the topological insulators brings anomalous elastic wave properties which diversifies classic wave functions for potential broad applications. To obtain topological mechanical wave states with good ...
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Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and Refractors
American Physical Society (2019-01-11)We present an extensive formulation of the inverse grating problem for flexural waves in which the energy of each diffracted mode is selected and the grating configuration is then obtained by our solving a linear system ... -
Loss compensation in time-dependent elastic metamaterials
American Physical Society (2018)Materials with properties that are modulated in time are known to display wave phenomena showing energy increasing with time, with the rate mediated by the modulation. Until now there has been no accounting for ...
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Machine learning assisted intelligent design of meta structures: a review
OAE Publishing (2023-10)In recent years, the rapid development of machine learning (ML) based on data-driven or environment interaction has injected new vitality into the field of meta-structure design. As a supplement to the traditional ...
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Majorana-like Zero Modes in Kekulé Distorted Sonic Lattices
American Physical Society (2019)Topological phases have recently been realized in bosonic systems. The associated boundary modes between regions of distinct topology have been used to demonstrate robust waveguiding, protected from defects by the topology ...
