Broad-Band Negative Refraction via Simultaneous Multi-Electron Transitions

TL;DR

This paper investigates how simultaneous multi-electron transitions and dipole redistribution in solids and molecules can significantly broaden the bandwidth of negative refraction, linking metamaterials with Möbius strip concepts.

Contribution

It reveals that multi-electron transitions with shared transition frequencies enhance negative refraction bandwidth, a novel insight connecting quantum transitions and metamaterial properties.

Findings

Negative refraction bandwidth increased by at least tenfold.

Simultaneous multi-electron transitions are key to broadening negative refraction.

Enhanced transition dipoles contribute to the effect.

Abstract

We analyze different factors which influence the negative refraction in solids and multi-atom molecules. We find that this negative refraction is significantly influenced by simultaneous multi-electron transitions with the same transition frequency and dipole redistribution over different eigenstates. We show that these simultaneous multi-electron transitions and enhanced transition dipole broaden the bandwidth of the negative refraction by at least one order of magnitude. This work provides additional connection between metamaterials and Mobius strips.