Spectral Green's Function for SPR Meta-Structures

Abstract

In this paper we propose a new approach to study the electromagnetic field in Surface Plasmon Resonance (SPR) meta-structures. The geometry is a planar structure infinitely extended with a pulse excitation current embedded in the substrate. The general solution has been applied to a specific geometry that is frequently employed to model practical problems. The minimization of the thickness changes spectral Green's function in a more efficient form, suitable for calculations. Plasmon electric field expression on interface plane is obtained. This kind of meta-structures is suitable in various fields of application (e.g. optoelectronics and electromagnetic sensors).

Electromagnetic Nanoparticles for Sensing and Medical Diagnostic Applications

“…Although fiber optics possess lower resolution and high sensitivity to external disturbances [ 15 ], they show a broader (spatial/frequency) bandwidth compared to the Kretschmann configuration. Thanks to recent and advanced fabrication techniques, new structures have been developed such long period [ 16 ] or Bragg gratings [ 17 ], nanometer devices [ 18 , 19 ], discontinuities [ 20 , 21 ] and new materials [ 22 , 23 ], presenting enhanced sharp resonances and improved performances. A peculiar type of materials that has been exploited in the past as biosensors is the so-called metamaterial.…”

Low-Loss and Light Substrate Integrated Waveguide Using 3D Printed Honeycomb Structure

“…To design the SIW using PLA material, PLA electrical properties need to be characterized for EM analysis. An infinitely large and open-ended artificial substrate can be analyzed using spectral Green’s functions [23]. However, we used the transmission line technique to characterize the effective permittivity and permeability for simplicity [24].…”

Higher-order mode substrate integrated waveguide cavity excitation for microstrip patch antenna arrays at 30-GHz

“…Effective medium theory gives a wide range of tools for the analysis of composite materials [30]. The Green's function approach is especially suited to multilayer structures and has been applied to many metamaterial problems, and the technique has recently been extended to analyse surface plasmon resonance at interfaces for metastructures [31]. The absorbing boundary condition method has also been used for metamaterial modelling, such as wideband absorbers using mushroom-type elements [32] and is important for substrate integrated waveguide modelling, which has been demonstrated using the finite-difference frequency domain method [33].…”