Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 93: Poster Session: Metal-Semiconductor Hybrid Systems, Plasmonic Systems / Photonic Crystals / Carbon: Diamond & CNT / Quantum Information Systems

HL 93.6: Poster

Donnerstag, 29. März 2012, 16:00–19:00, Poster D

Transmission enhancement in three-dimensional rolled-up metamaterials including plasmonic structures — •Aune Koitmäe, Andreas Rottler, Stephan Schwaiger, Detlef Heitmann, Cornelius Bausch, Stefan Mendach, Eric Stava, and Robert Blick — Institut für Angewandte Physik, Universität Hamburg

We present numerical finite difference time domain (FDTD) simulations on three-times rolled-up semiconductor/metal microtubes (RUMMs) including an active InGaAs layer and a Ag grating [1]. The thickness of the metal layer and the grating periodicity have an influence to the wavelength of the SPP resonance and are chosen such that the resonance matches the wavelength of the quantum well emission. The simulations show a strong transmission enhancement when the RUMM is illuminated with p-polarized light. This is due to the coupling between the SPP resonance and the emission of the quantum well. Simulations using s-polarized light do not show strong transmission enhancement, and are comparable with the simulations including planar Ag layers instead of Ag gratings. Measurements of transmission enhancement on RUMMs including planar Ag film are presented in [2].

Semiconductor tubes can be used for biological applications [3].

[1] A. Rottler et al., J. Opt. Soc. Am. B 28, 2402 (2011).

[2] S. Schwaiger et al., Phys. Rev. B 84, 155325 (2011).

[3] M. Yu et al., American Chemical Society (2011).