Papers by Javier Oliva Rivero
Scientific reports, Jan 17, 2018
In recent years, invisibility has become a research area of increasing interest due to the advanc... more In recent years, invisibility has become a research area of increasing interest due to the advances in material engineering. It may be possible to achieve invisibility through cloaking devices by coating the body using one or more layers of materials with the proper electromagnetic properties. By using techniques associated to plasmonic cloaking it is maybe possible to obtain also invisibility for small objects with several layers of homogeneous materials working from inside the object. We demonstrate numerically that it is, therefore, possible to achieve invisibility through an inner system based on scattering cancellation techniques.
Fast Surface Integral-Equation Solutions of Metamaterial and Plasmonic Problems
Comparative study of the integral equation formulations when analyzing left-handed materials
A wide analysis of metamaterial spheres with dif- ferent constitutive parameters has been carried... more A wide analysis of metamaterial spheres with dif- ferent constitutive parameters has been carried out employing MoM-based SIE formulations. The study has been focused on the accuracy assessment of formulations combining normal equations (CNF), tangential equations (CTF and PMCHWT) and both of them (JMCFIE) when dealing with double negative materials. Relevant and informative features as the condition number, the eigenvalues
Surface integral equation (SIE) approaches for the accurate solution of different problems in com... more Surface integral equation (SIE) approaches for the accurate solution of different problems in computational electromagnetics are addressed. First, an efficient message passing interface (MPI)/OpenMP parallel implementation of the multilevel fast multipole algorithm-fast Fourier transform (MLFMA-FFT) is presented for the solution of large-scale conducting bodies. By combining the high scalability of the fast multipole method-FFT (FMM-FFT) with the high efficiency of MLFMA, challenging problems up to one billion unknowns are solved using a parallel supercomputer. Second, looking for the extension of these rigorous approaches to new demanded areas, the SIE method is successfully applied to the solution of left-handed metamaterials and plasmonic nanostructures. Numerical examples are presented to confirm the validity and versatility of this approach for the accurate resolution of problems in the context of leading-edge nanoscience and nanotechnology applications. Index Terms ─ Fast multipole methods, metamaterials, method of moments, parallel programming, plasmonics, supercomputing, surface integral equations.
Method of Moments formulation for the analysis and design of plasmonic nano-optical antennas of arbitrary shape
In this work, the well-known Method of Moments (MoM) is applied to the solution of plasmonic meta... more In this work, the well-known Method of Moments (MoM) is applied to the solution of plasmonic metallic nanostructures at optical frequencies. Using the surface equivalent theorems, the MoM approach is applied only on the material boundary surfaces and interfaces, thus avoiding the cumbersome volumetric discretization of objects and surrounding space. Some canonical examples have been analyzed and the results have
Comparison of Surface Integral Equations for Left-Handed Materials
Progress in Electromagnetics Research-Pier, 2011
MLFMA-FFT algorithm for the solution of challenging problems in electromagnetics
... of Galicia (CESGA). Around 6TB of RAM and 64 distributed nodes (each node consisting of a cc-... more ... of Galicia (CESGA). Around 6TB of RAM and 64 distributed nodes (each node consisting of a cc-NUMA HP Integrity rx7640 with 8 dual core Intel Itanium2 Montvale processors) were required for the solution. And recently we ...
Optimization of invisibility cloaks by surface integral equation method
ABSTRACT The surface integral equation (SIE) and the method of moments (MoM) are combined with a ... more ABSTRACT The surface integral equation (SIE) and the method of moments (MoM) are combined with a genetic algorithm (GA) for the design of multilayer invisibility shells. Thickness and material composition of the layers are simultaneously optimized to minimize the scattering cross section (SCS). The proposed procedure brings the possibility of easily including different shape and/or material constraints on the cloak design, which indeed is of great interest for manufacturing purposes.
Fast surface integral equation formulations for large-scale conductors, metamaterials, and plasmonic problems
ABSTRACT Surface-integral-equation (SIE) approaches are presented for the accurate solution of di... more ABSTRACT Surface-integral-equation (SIE) approaches are presented for the accurate solution of different problems in computational electromagnetics. First, an efficient message passing interface (MPI)/OpenMP parallel implementation of the multilevel fast multipole algorithm-fast Fourier transform (MLFMA-FFT) is presented for the solution of large-scale conducting bodies. Second, looking for the extension of these rigorous approaches to new demanded areas, the SIE method is successfully applied to the solution of left-handed metamaterials and plasmonic nanostructures.
Design of optical nanoantennas with the surface integral equation method of moments
ABSTRACT Numerical computations using surface integral equation formulations solved by the method... more ABSTRACT Numerical computations using surface integral equation formulations solved by the method of moments are carried out in order to demonstrate that these techniques are useful tools for optical nanoantennas design. It is shown that almost frequency independent directivity patterns can be obtained over a large bandwidth for judiciously designed log-periodic nanoantennas.
Design of broadband nano-optical antennas with the surface method of moments
ABSTRACT The aim of this work is to explore new nanoantenna designs using a surface method of mom... more ABSTRACT The aim of this work is to explore new nanoantenna designs using a surface method of moments formulation trying to provide high directivity patterns for light in a large bandwidth.
Comparative of surface integral equation formulations when applied to plasmonic problems
ABSTRACT In this work, the behavior of most extended surface integral equation (SIE) formulations... more ABSTRACT In this work, the behavior of most extended surface integral equation (SIE) formulations is analyzed and compared when dealing with plasmonic problems. An analytical solution is used as reference result in near and far field calculations.
Integral equation formulations for the analysis of left-handed metamaterials
2010 IEEE Antennas and Propagation Society International Symposium, 2010
Double negative materials, with simultaneously negative electric permittivity () and magnetic per... more Double negative materials, with simultaneously negative electric permittivity () and magnetic permeability (μ), have received much attention because of their unusual electromagnetic properties. They form a group of man-made materials that possess non-naturally ...
Supercomputer Aware Approach for the Solution of Challenging Electromagnetic Problems
Progress In Electromagnetics Research, 2010
Solution of large-scale plasmonic problems with the multilevel fast multipole algorithm
Optics Letters, 2012
Comparison of surface integral equation formulations for electromagnetic analysis of plasmonic nanoscatterers
Optics Express, 2012
The performance of most widespread surface integral equation (SIE) formulations with the method o... more The performance of most widespread surface integral equation (SIE) formulations with the method of moments (MoM) are studied in the context of plasmonic materials. Although not yet widespread in optics, SIE-MoM approaches bring important advantages for the rigorous analysis of penetrable plasmonic bodies. Criteria such as accuracy in near and far field calculations, iterative convergence and reliability are addressed to assess the suitability of these formulations in the field of plasmonics.
Electromagnetic Analysis of Metamaterials and Plasmonic Nanostructures with the Method of Moments
IEEE Antennas and Propagation Magazine, 2012
ABSTRACT The well-known Method of Moments (MoM) formulation is used for the analysis of several t... more ABSTRACT The well-known Method of Moments (MoM) formulation is used for the analysis of several three-dimensional problems comprising left-handed materials, plasmonic nanoparticles, and dielectric objects. The problems are formulated in terms of surface integral equations (SIEs), requiring only the discretization of the material boundary surfaces and interfaces to expand the unknown electric and magnetic equivalent currents. The numerical examples presented demonstrate the versatility and capabilities of the SIE-MoM approach to deal with complex composite bodies involving different kinds of media in the context of nanoscience and nanotechnology.
Supercomputing aware electromagnetics
computaex.es
... JMTaboada, L.Landesa, J.Rivero, G.Gajardo-Silva, M.Amaya are with the Dept. ... Finis Terrae ... more ... JMTaboada, L.Landesa, J.Rivero, G.Gajardo-Silva, M.Amaya are with the Dept. ... Finis Terrae consists of 142 cc-NUMA HP Integrity rx7640 with 8 dual core Intel Itanium 2 Montvale processors at 1.6 GHz with 18 MB L3 cache and 128 GB of memory, and two Integrity Superdome ...
Journal of the Optical Society of America A, 2011
We present a surface integral equation (SIE) to model the electromagnetic behavior of metallic ob... more We present a surface integral equation (SIE) to model the electromagnetic behavior of metallic objects at optical frequencies. The electric and magnetic current combined field integral equation considering both tangential and normal equations is applied. The SIE is solved by using a method-of-moments (MoM) formulation. The SIE-MoM approach is applied only on the material boundary surfaces and interfaces, avoiding the cumbersome volumetric discretization of the objects and the surrounding space required in differential-equation formulations. Some canonical examples have been analyzed, and the results have been compared with analytical reference solutions in order to prove the accuracy of the proposed method. Finally, two plasmonic Yagi-Uda nanoantennas have been analyzed, illustrating the applicability of the method to the solution of real plasmonic problems.
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Papers by Javier Oliva Rivero