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Browsing by Subject "Metamaterials"

Now showing items 21-40 of 47

High order standing-wave plasmon resonances in silver u-shaped nanowires

Rodríguez Fortuño, Francisco José; Ortuño Molinero, Rubén; García Meca, Carlos; Martí Sendra, Javier; Martínez Abietar, Alejandro José (American Institute of Physics (AIP), 2012)

Optical measurements of the transmission spectra through nanofabricated planar arrays of silver u-shaped nanowires on a silicon substrate resonating at infrared frequencies are performed. Good agreement with the numerically ...
Interferences in Locally Resonant Sonic Metamaterials Formed from Helmholtz Resonators

Peiró-Torres, María Del Pilar; Castiñeira Ibáñez, Sergio; Redondo, Javier; Sánchez Pérez, Juan Vicente (American Institute of Physics, 2019-04-29)

[EN] The emergence of materials artificially designed to control the transmission of waves, generally called metamaterials, has been a hot topic in the field of acoustics for several years. The design of these metamaterials ...
Low-Loss multilayered metamaterial exhibiting a negative index of refraction at visible wavelengths

García Meca, Carlos; Hurtado Montañés, Juan; Martí Sendra, Javier; Martínez Abietar, Alejandro José; Dickson, Wayne; Zayats, Anatoly V. (American Physical Society, 2011-02-11)

We experimentally demonstrate a low-loss multilayered metamaterial exhibiting a double-negative refractive index in the visible spectral range. To this end, we exploit a second-order magnetic resonance of the so-called ...
Low-Q whispering gallery modes in anisotropic metamterials shells

Díaz Rubio, Ana; Carbonell Olivares, Jorge; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (American Physical Society, 2013-09)

Anisotropic and inhomogeneous metamaterial shells are studied in order to exploit all their resonant mode richness. These multilayer structures are based on a cylindrical distribution of radially dependent constitutive ...
Magnetismo artificial a frecuencias ópticas

Lorente Crespo, María (Universitat Politècnica de València, 2013-07-08)

[ES] En este trabajo se demuestra que la resonancia plasmónica excitada en un array de nano-anillos de oro bajo incidencia normal cambia de carácter, de eléctrico a magnético, si los anillos tienen una altura lo sufientemente ...
Manipulating polarization of light with ultrathin epsilon-near-zero metamaterials

Ginzburg, Pavel; Rodríguez Fortuño, Francisco José; Wurtz, G.A.; Dickson, W.; Murphy, Antony; Morgan, F.; Pollard, Robert; Iorsh, Ivan; Atrashchenko, Alexander; Belov, Pavel; Kivshar, Y.S.; Nevet, A.; Ankonina, G.; Orenstein, M.; Zayats, A.V. (Optical Society of America, 2013-06-13)

[EN] One of the basic functionalities of photonic devices is the ability to manipulate the polarization state of light. Polarization components are usually implemented using the retardation effect in natural birefringent ...
Mirror-image-induced magnetic modes

Xifre Perez, Elisabet; Shi, Lei; Tuzer, Turan Umut; Fenollosa Esteve, Roberto; Ramiro Manzano, Fernando; Quidant, Romain; Meseguer Rico, Francisco Javier (American Chemical Society, 2013-01)

Reflection in a mirror changes the handedness of the real world, and right-handed objects turn left-handed and vice versa (M. Gardner, The Ambidextrous Universe, Penguin Books, 1964). Also, we learn from electromagnetism ...
Monodisperse silicon nanocavities and photonic crystals with magnetic response in the optial region

Shi, Lei; Harris, Justin T.; Fenollosa Esteve, Roberto; Rodríguez, Marie-Isabelle; Lu, Xiaotang; Korgel, Brian; Meseguer Rico, Francisco Javier (Nature Publishing Group, 2013-05)

[EN] It is generally accepted that the magnetic component of light has a minor role in the light-matter interaction. The recent discovery of metamaterials has broken this traditional understanding, as both the electric and ...
Multidisciplinary approach to cylindrical anisotropic metamaterials

Carbonell Olivares, Jorge; Torrent Martí, Daniel; Díaz Rubio, Ana; Sánchez-Dehesa Moreno-Cid, José (IOP Publishing: Open Access Journals, 2011)

Anisotropic characteristics of cylindrically corrugated microstructures are analyzed in terms of their acoustic and electromagnetic (EM) behavior paying special attention to their differences and similarities. A simple ...
Multiple scattering formulation of two-dimensional acoustic and electromagnetic metamaterials

Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (IOP Publishing: Open Access Journals, 2011-09-09)

A multiple scattering formulation of two-dimensional (2D) acoustic metamaterials is presented. This approach is comprehensive and can lead to frequency-dependent effective parameters (scalar bulk modulus and tensorial mass ...
Nonlocal electrodinamics of homogenized metal-dielectric photonic crystals

Konovalenko, Anatolii; Reyes-Avendaño, Jorge A.; Méndez-Blas, Antonio; Cervera Moreno, Francisco Salvador; Myslivets, Evgeny; Radic, Stojan; Sánchez-Dehesa Moreno-Cid, José; Pérez-Rodríguez, Felipe (IOP Publishing, 2019-08)

[EN] The nonlocal effective permittivity tensor for photonic crystals (PCs), having dielectric and metallic inclusions in the unit cell, is calculated and analyzed within the homogenization theory based on the Fourier ...
Nontensorial transformation optics

García Meca, Carlos; Barceló, Carlos (American Physical Society, 2016-06-17)

[EN] We present an alternative version of transformation optics that allows us to mold the flow of light without rotating or scaling the electromagnetic fields. The resulting media experience unusual force densities, are ...
Novel Applications of Optical Diffraction Tomography: On-chip Microscopy and Detection of Invisibility Cloaks

Díaz Fernández, Francisco Javier (Universitat Politècnica de València, 2022-01-21)

[ES] La tomografía por difracción surge para mejorar las técnicas de imagen al considerar la naturaleza ondulatoria de la luz. Mientras que los primeros sistemas de imagen médica se basaban únicamente en fuentes sin ...
Omnidirectional broadband acoustic absorber based on metamaterials

Climente Alarcón, Alfonso; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2012-04-06)

We present the design, construction, and experimental characterization of the acoustic analogue of the so called photonic black-hole. The fabricated sample has cylindrical symmetry and consists of two parts, a shell that ...
Radial Photonic Crystals as frequency and position sensors

Díaz Rubio, Ana (Universitat Politècnica de València, 2013-02-19)

[ES] En este trabajo se analizarán las propiedades de las estructuras conocidas como Cristales Fotónicos Radiales y sus posibles aplicaciones como sensores de frecuencia y posición. Las propiedades de estos dispositivos ...
Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems

Jimenez, Noe; Romero García, Vicente; Pagneux, Vincent; Groby, J.P. (Nature Publishing Group, 2017)

[EN] Perfect, broadband and asymmetric sound absorption is theoretically, numerically and experimentally reported by using subwavelength thickness panels in a transmission problem. The panels are composed of a periodic ...
Resonadores de anillo partido. Acople a líneas de transmisión y sensibilidad

Sánchez Pastor, Jesús (Universitat Politècnica de València, 2017-12-02)

Study of the behaviour of Split Ring Resonators and their Complementary counterpart when coupled to a Transmission Line (microstrip line and coplanar waveguide), as well as their capacity to distinguish between different ...
Resonant coupling of Rayleigh waves through a narrow fluid channel causing extraordinary low acoustic transmission

García Chocano, Víctor Manuel; Nagaraj; López-Rios Fernández, Tomás; Gumen, Lyudmila; Sánchez-Dehesa Moreno-Cid, José; Krokhin, Arkadii (Acoustical Society of America, 2012-10)

Coupling of Rayleigh waves propagating along two metal surfaces separated by a narrow fluid channel is predicted and experimentally observed. Although the coupling through a fluid (water) is weak, a strong synchronization ...
Scattering Evaluation of Equivalent Surface Impedances of Acoustic Metamaterials in Large FDTD Volumes Using RLC Circuit Modelling

Ballestero, Eric; Hamilton, Brian; Jimenez, Noe; Romero-García, Vicent; Groby, Jean Philippe; Aygun, Haydar; Dance, Stephen (MDPI AG, 2021-09)

[EN] Most simulations involving metamaterials often require complex physics to be solved through refined meshing grids. However, it can prove challenging to simulate the effect of local physical conditions created by said ...
Simple closed-form property expressions of a metafluid composed of a hexagonal array of transversely isotropic elastic fibres embedded in an ideal fluid

Sabina, Federico J.; Guinovart-Díaz, Raúl; Rodríguez-Ramos, Reinaldo; Bravo-Castillejo, Julián; Sánchez-Dehesa Moreno-Cid, José (Elsevier, 2019-07)

[EN] A hexagonal array of parallel circular cylinders embedded in a matrix is considered. The fibers are filled with a transversely isotropic (TI) elastic material whereas the matrix material is an ideal fluid. The asymptotic ...