We present a way of exciting surface plasmon polaritons along non-patterned metallic surfaces by means of a flat squeezing slab designed with transformation optics. The slab changes the dispersion relation of incident ...
[EN] High-index dielectric disks with subwavelength
dimensions seem relatively simple electromagnetic structures.
However, they can give rise to exotic phenomena in
nanophotonics. Here we show recent findings that show ...
Espinosa-Soria, Alba; Griol Barres, Amadeu; Martínez Abietar, Alejandro José(Optical Society of America, 2016-05-02)
In this work, we report numerical simulations and experiments of the optical response of a gold nanostrip embedded in a silicon strip waveguide gap at telecom wavelengths. We show that the spectral features observed in ...
Díaz-Escobar, Evelyn; Barreda-Gómez, Ángela Inmaculada; Griol Barres, Amadeu; Martínez, Alejandro(American Institute of Physics, 2022-11-14)
[EN] Anapole states¿characterized by a strong suppression of far-field scattering¿naturally arise in high-index nanoparticles as a result of the interference between certain multipolar moments. Recently, the first-order ...
[EN] The interaction of light with subwavelength metallic nano-structures is at the heart of different
current scientific hot topics, namely plasmonics, metamaterials and nanoantennas. Research in
these disciplines during ...
Ortuño Molinero, Rubén(Universitat Politècnica de València, 2012-02-03)
Esta tesis trata sobre el fascinante fenómeno de la transmisión extraordinaria a través de láminas metálicas nonoestructuradas periódicamente con aperturas al corte. Un efecto relacionado con la excitación de un tipo de ...
[EN] We propose a very compact metasurface that works as a quarter-wave plate at two
different frequencies, 1 THz and 2.2 THz. The fractional bandwidth of the first band is remarkably
32.2%, beyond the state-of-the-art
The fundamental electric dipolar resonance of metallic nanostrips placed on top of a dielectric
waveguide can be excited via evanescent wave coupling, thus giving rise to broad dips in the
transmission spectrum of the ...
[EN] Dynamical radiation pressure effects in cavity optomechanical systems give rise to self-sustained oscillations or 'phonon lasing' behavior, producing stable oscillators up to GHz frequencies in nanoscale devices. Like ...
García Meca, Carlos; Ortuño Molinero, Rubén; Martí Sendra, Javier; Martínez Abietar, Alejandro José(IOP Publishing: Open Access Journals, 2014-02-21)
We present a method that enables the implementation of full three-dimensional (3D) transformation media with minimized anisotropy. It is based on a special kind of shape-preserving mapping and a subsequent optimization ...
[EN] Locking of oscillators to ultra-stable external sources is of paramount importance for improving close-to-carrier phase noise in free running oscillators. In most of them, such as Micro-Electro-Mechanical-Systems or ...
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 ...
Rodríguez Fortuño, Francisco José; Martínez Marco, Mª Luz; Tomás Navarro, Begoña; Ortuño Molinero, Rubén; Martí Sendra, Javier; Martínez Abietar, Alejandro José; Rodríguez Cantó, Pedro Javier(American Institute of Physics, 2011)
In this work, we report the design, fabrication, and characterization of gold nanocrosses for chemosensing purposes. The nanocrosses are designed to exhibit a localized surface plasmon resonance which is very sensitive to ...
Puerto Garcia, Daniel; Griol Barres, Amadeu; Escalante Fernández, José María; Pennec, Yan; Djafari-Rouhani, Bahram; Beugnot, Jean-Charles; Laude, Vincent; Martínez Abietar, Alejandro José(Institute of Electrical and Electronics Engineers (IEEE), 2012-11-15)
[EN] We report experimental evidence of light guiding at telecommunication wavelengths along line-defect honeycomb-lattice photonic crystal waveguides created in suspended silicon slabs. Numerical results show that the ...
Barreda, Ángela I.; Zapata-Herrera, Mario; Palstra, Isabelle M.; Mercadé-Morales, Laura; Aizpurua, Javier; Koenderink, A. Femius; Martínez Abietar, Alejandro José(Optical Society of America, 2021-12-01)
[EN] Hybrid photonic-plasmonic cavities have emerged as a new platform to increase light-matter interaction capable to enhance the Purcell factor in a singular way not attainable with either photonic or plasmonic cavities ...
[EN] Hybrid photonic-plasmonic cavities can be tailored to display high
Q factors and extremely small mode volumes simultaneously, which ultimately results in large values of the Purcell factor. Amongst the different ...
López March, Raúl(Universitat Politècnica de València, 2021-10-11)
[ES] La quiralidad es la propiedad de un objeto de no ser superponible con su imagen especular. Esta propiedad aplica a objetos a cualquier escala, desde nuestras manos a moléculas. De hecho, es posible conocer la quiralidad ...
[EN] Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in a deeply sideband-unresolved optomechanical system. The high-amplitude mechanical oscillations are driven by the ...
Sánchez Gomariz, Erica(Universitat Politècnica de València, 2017-12-02)
The Split Ring Resonator (SRR) is a basic element in nanophotonics since it allows to obtain negative magnetic permeabilities at optical frequencies. In this way, metamaterials can be obtained from SRR arrays with responses ...
Xomalis, Angelos; Zheng, Xuezhi; Demetriadou, Angela; Martínez, Alejandro; Chikkaraddy, Rohit; Baumberg, Jeremy J.(American Chemical Society, 2021-03-24)
[EN] Plasmonic self-assembled nanocavities are ideal platforms for extreme light localization as they deliver mode volumes of <50 nm(3). Here we show that high-order plasmonic modes within additional micrometer-scale ...