A lossless metamaterial with tunable permittivity and its application as a compact phase shifter

TL;DR

This paper introduces a novel lossless metamaterial with tunable permittivity, capable of efficiently modulating the phase of incident light with minimal reflection, useful for compact phase shifting applications.

Contribution

A new lossless metamaterial with adjustable permittivity from negative to positive, enabling efficient phase modulation with negligible reflection.

Findings

Permittivity tunable from negative to positive

Significant phase modulation of incident pulses

Negligible reflection loss during phase shifting

Abstract

In this Letter, we propose a new type of lossless metamaterial whose effective permittivity is tunable from negative to positive values. Its optical response is studied analytically and numerically. We further demonstrate that this tunable metamaterial can significantly modulate the phase of an incident pulse with negligible reflection loss, functioning as an efficient phase shifter.