Negative Refraction Studies

We developed a promising new idea on how to implement negative refraction at optical frequencies and with low loss (Kaestel, Fleischhauer, Yelin, Walsworth, Physical Review Letters99, 073602 (2007)). The idea exploits "Electromagnetically Induced Chirality" (EIC): i.e., the use of quantum interference effects similar to EIT (Electromagnetically Induced Transparency) to couple a magnetic dipole transition coherently with an electric dipole transition, which enables negative refraction without requiring negative permeability while also suppressing absorption.