Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 85: Poster Session II

HL 85.8: Poster

Donnerstag, 17. März 2011, 18:00–21:00, P4

Tunable Transmission in Rolled-Up Three Dimensional Metamaterials — •Aune Koitmäe, Stephan Schwaiger, Matthias Klingbeil, Markus Broell, Jochen Kerbst, Ricardo Costa, Andrea Stemmann, Yuliya Stark, Detlef Heitmann, and Stefan Mendach — Institut für Angewandte Physik, Universität Hamburg, Hamburg, Deutschland

Metamaterials are artificial materials with tuneable permittivity and permeability. Alternating layers of metal/dielectric films are rolled up with multiple rotations into three-dimensional microtubes. The walls of these tubes represent three dimensional metamaterials with a well defined lattice constant and a tuneable anisotropic permittivity [1]. By integrating quantum wells as optical amplifiers into the walls of the microtube we can modify the transmission through the tube walls. Transmission measurements are performed using a tapered optical fibre which illuminates the tube from the inside. A microscope objective collects the light transmitted through the tube walls. The same objective is used to focus a pumping laser on the tube. By comparing measurements with and without laser pumping we obtain a characteristic modification of the transmission through the tube walls.

We gratefully acknowledge support by the DFG through GrK 1286.

[1] S. Schwaiger et al., Phys. Rev. Lett. 102, 163903 (2009)