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 Letters, 99, 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.
- Low-loss negative refraction by laser induced magneto-electric cross-coupling. J. Kastel, M. Fleischhauer, S.F. Yelin and R.L. Walsworth. Physical Review A, 79, 063818 (2009). 0901.0664v1.
- Tunable negative refraction without absorption via electromagnetically induced chirality. J. Kastel, M. Fleischhauer, S.F. Yelin and R.L. Walsworth. Physical Review Letters 99, 073602 (2007). quant-ph/0702234v2.