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HL: Fachverband Halbleiterphysik

HL 51: Poster IV

HL 51.12: Poster

Donnerstag, 28. Februar 2008, 16:30–19:00, Poster D

Rolled-up Metal Semiconductor Tubes as Building Blocks for Metamaterials — Nils Gerken, •Stephan Schwaiger, Markus Broell, Detlef Heitmann, and Stefan Mendach — Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg

Materials which are composed of artificially designed building blocks and which can be described by effective parameters i.e. the permeabilitiy µ and the permittivity є are called metamaterials. A lot of research is presently put into tailoring the effective optical parameters of different kinds of metamaterials. Typically, a wide range of values for the permittivity є and permeability µ can be achieved by constructing metamaterials which exhibit resonances in both є and µ [1]. Realising the desired combination of є and µ at a certain wavelength is then basically a task of shifting these two resonances to the corresponding spectral position. By means of finite difference time domain calculations we here investigate the possibility to employ flexible rolled-up metal semiconductor tubes [2] as building blocks for metamaterials with in-situ tuneable permeability and permittivity. We show that the magnetic resonance of a metal semiconductor tube with 1 µm diameter can be shifted between 24 and 32 THz by mechanical deformation. We gratefully acknowledge support by the DFG through SFB 508 and GRK 1286. [1] J.B. Pendry, IEEE Transactions on Microwave Theory and Techniques, Vol. 47, 2075 (1999) [2] O. Schumacher et al., Applied Physics Letters 86, 143109 (2005)