Reflection-less device allows electromagnetic warp drive

TL;DR

This paper introduces a novel design of reflection-less electromagnetic devices using layered materials with opposite refractive indices, enabling efficient wave tunneling and an electromagnetic warp drive effect without reflection or transmission loss.

Contribution

The authors propose a simple layered structure with negative and positive refractive indices that achieves reflection-less electromagnetic wave guidance, demonstrating practical feasibility for warp drive-like effects.

Findings

Achieves perfect reflection-less wave transmission

Enables electromagnetic tunneling between layers

Demonstrates practical design without high refractive indices

Abstract

One of the striking properties of artificially structured materials is the negative refraction, an optical feature that known natural materials do not exhibit. Here, we propose a simple design, composed of two parallel layers of materials with different refraction indices $n_1=-n_2$, that constructs perfect reflection-less devices. The electromagnetic waves can tunnel from one layer to the other, a feature that resembles a truncation of the physical space leading to an electromagnetic warp drive. Since the refractive indices do not require any large values, this method demonstrates for the first time the practical feasibility of guiding electromagnetic fields in complete absence of reflection phenomena and without degradation of transmission efficiency at all.