Broadening the Bandwidth of Epsilon-Near-Zero Metamaterials with Embedded Square Frames

Broadening the Bandwidth of Epsilon-Near-Zero Metamaterials with Embedded Square Frames

Blog Article

A narrow frequency bandwidth of epsilon-near-zero metamaterials limits the use of many optical, microwave, and electronic devices.In this paper, we propose a recipe to broaden the operational bandwidth by employing a structure of properly tailored square frames nested 3m speedglas 9002nc within each other.To illustrate this effect, we derive the effective permittivity for the considered frame geometry.Then, we show that combining constituent materials with loss and materials with gain enables us to u11-200ps achieve the effective permittivity over a frequency band as small as desired.This technique may prove valuable for various applications including invisibility cloaks, camouflage, shielding, and sensorics.