Strongly Resonant Transmission of Electromagnetic Radiation in Periodic Anisotropic Layered Media

TL;DR

This paper demonstrates that periodic anisotropic layered media can achieve highly resonant electromagnetic transmission with high Q-values and near-perfect impedance matching, even with a small number of layers, through the use of split band edge structures.

Contribution

It introduces the concept of split band edge in anisotropic layered media to enhance resonant properties and demonstrates a microwave resonance with Q~220 in a practical setup.

Findings

High Q-value transmission resonance (Q~220) achieved with N=12 layers.

Split band edge structures enable superior resonant properties.

Near-perfect impedance matching at boundaries despite few layers.

Abstract

The electromagnetic dispersion in periodic layered media can be tailored and their resonant properties can be considerably improved by utilizing anisotropic materials. Periodic structures with a photonic band edge split into two parts, or so-called split band edge, exhibit superior resonant properties including exceptionally high Q-values of transmission resonances and nearly perfect impedance matching at the boundaries, even when the number of unit cells N is not large. A microwave transmission resonance with Q~220 is demonstrated in a periodic stack of form-birefringent layers with N=12 realized in a waveguide geometry.