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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster III
Q 55.15: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 8 Foyer
Chiral and non-chiral negative refraction with low absorption via magneto-electric cross-couplings — •Jürgen Kästel1, Michael Fleischhauer1, Susanne F. Yelin2,3, and Ronald L. Walsworth2,4 — 1Fachbereich Physik, Technische Universität Kaiserslautern, Germany — 2ITAMP, Cambridge, MA, USA — 3UConn, Storrs, CT, USA — 4Harvard University, Cambridge, MA, USA
Negative refraction of light advanced to one of the most active areas in photonics research in recent years. As the generation of a negative index of refraction in metamaterials is well understood the strong absorption present in such media remains to be the main obstacle to applications. We propose a novel approach that uses effects similar to EIT leading to resonantly enhanced magneto-electric cross-coupling which leads to negative refraction with simultaneously strong suppression of absorption. The refractive index can be fine-tuned and impedance matched by means of external laser fields. We analyze the orientation and polarization dependence of the refractive index and discuss the prospects of attaining an isotropic and/or polarization independent, i.e., non-chiral refraction.