Ghost sensing: the rise and role of exceptional points in planar geometry

TL;DR

This paper explores how ghost waves in biaxial anisotropic media can be utilized for optical sensing, leveraging exceptional points to achieve high sensitivity, simplicity, and noise robustness in planar geometries.

Contribution

It introduces a novel sensing approach using ghost waves and exceptional points in planar geometries, enhancing sensitivity and robustness over existing methods.

Findings

High sensitivity and precision demonstrated

Planar geometry simplifies sensor design

Robustness against noise confirmed

Abstract

We show the recently discovered ghost waves - a special class of non-uniform electromagnetic waves in biaxial anisotropic media - can be used for optical sensing based on exceptional points. In addition to showing high sensitivity and precision, the proposed sensor employs simple planar geometry and is robust against noise.