Berlin 2008 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 5: Symposium Nanostructured Photonic Materials
HL 5.5: Hauptvortrag
Montag, 25. Februar 2008, 17:15–17:45, ER 270
Scaling left-handed materials towards optical frequencies — •Maria Kafesaki1, Raluca Penciu1, Thomas Koschny1,2, Eleftherios Economou1, and Costas Soukoulis1,2 — 1Foundation for Research and Technology Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), P.O. Box 1527, 71110 Heraklion, Crete, Greece, and University of Crete, Greece — 2Ames Laboratory, and Dept. of Physics and Astronomy, Iowa State University, Ames, Iowa
Left-handed materials (LHMs), i.e. materials with electrical permittivity and magnetic permeability both negative over a common frequency band, have been a subject of increasing interest in the last seven years. This is mainly due to their novel and unique properties (like backwards propagation, negative refraction, superlensing, etc) which entail new capabilities in the manipulation of electromagnetic waves.
A large part of the current efforts in the LHMs research is to achieve left-handed behavior beyond the microwave regime (where this behavior was initially demonstrated), and mainly in the optical regime, exploiting the unique capabilities of LHMs in applications like telecommunications and imaging. A common approach to obtain optical LHMs is the scaling down of well established microwave designs. In this talk we discuss the behavior of specific, well-established in microwaves left-handed designs as they are scaled down into the nanoscale, targeting optical frequencies. Particular attention will be given in the understanding of the scaling behavior of the effective permeability and permittivity, the magnetic resonance frequency and the losses in those designs.