Negative Refraction Without Negative Index

Abstract

Refraction of a microwave plane wave by a wedge with exact characterization of and is evaluated by a ray approach. Snell's Law is used for the lossless wedge, while exact formulations are used for the propagation constants and angle in the lossy wedge. The heavily lossy wedge produces negative refraction. Data are given on the loss factor that allows Snell refraction to be exactly reversed by lossy refraction, and the internal angle in the lossy wedge.