Dielectric resonances of ordered passive arrays

TL;DR

This paper analyzes dielectric resonances in ordered passive arrays using transfer matrix methods, providing a new approach for accurately determining resonance frequencies and aiding material design.

Contribution

It introduces a transfer matrix approach to identify dielectric resonances in passive arrays, linking eigenvalues to resonance conditions and extending analysis to large non-periodic networks.

Findings

Resonances occur when all transfer matrix eigenvalues are unity.

The method accurately predicts resonance frequencies for ordered arrays.

Asymptotic properties are derived for large, non-periodic arrays.

Abstract

The electrical and optical properties of ordered passive arrays, constituted of inductive and capacitive components, are usually deduced from Kirchhoff's rules. Under the assumption of periodic boundary conditions, comparable results may be obtained via an approach employing transfer matrices. In particular, resonances in the dielectric spectrum are demonstrated to occur if all eigenvalues of the transfer matrix of the entire array are unity. The latter condition, which is shown to be equivalent to the habitual definition of a resonance in impedance for an array between electrodes, allows for a convenient and accurate determination of the resonance frequencies, and may thus be used as a tool for the design of materials with a specific dielectric response. For the opposite case of linear arrays in a large network, where periodic boundary condition do not apply, several asymptotic properties are derived. Throughout the article, the derived analytic results are compared to numerical models, based on either Exact Numerical Renormalisation or the spectral method.