Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 44: Photonics II

Q 44.8: Vortrag

Donnerstag, 9. März 2017, 12:45–13:00, P 11

Effective Medium Theory for infinitely-long polaritonic cylinders — •Charalampos P. Mavidis^1,2, Maria Kafesaki^1,2, Eleftherios N. Economou^{1, 3}, and Costas M. Soukoulis^1,4 — ¹Institute of Electronic Structure and Laser, FORTH, 71110 Heraklion, Crete, Greece — ²Department of Materials Science and Technology, University of Crete, Heraklion, Crete, Greece — ³Department of Physics, University of Crete, Heraklion, Greece — ⁴Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

In this work we present an effective medium theory for infinitely-long cylinders in a host medium. Based on the scattering by a single cylinder we derive analytic expressions for all components of the effective electric permittivity and effective magnetic permeability tensors cylinder beyond the Maxwell-Garnett approximation of a system.

The derived equations are applied to systems of cylinders made of polaritonic materials (e.g. LiF, SiC, etc) immersed in dielectric materials in the THz part of the spectrum. Using different combinations of materials and radii many interesting phenomena arise, including hyperbolic dispersion relation, negative refractive index and Near-Zero index media. Finally, we test the results with full-wave numerical calculations using a Finite Element-based solver.