Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)

O 27.73: Poster

Dienstag, 24. März 2009, 18:30–21:00, P2

Calculation of optical near and far fields at metal-semiconductor hybrids — •Patrick Scholz, Stephan Schwieger, David Leipold, and Erich Runge — Fachgebiet Theoretische Physik I, Technische Universität Ilmenau, 98693 Ilmenau, Germany

We calculate electromagnetic field distributions on nanostructured metal-semiconductor hybrids that are illuminated with photons near the semiconductor exciton resonance. We solve Maxwell's equations in frequency (COMSOL, RF module) and time (Lumerical, inc, FDTD solutions) space. Further, we test an approximative boundary condition (SIBC) to avoid the calculation of the fields inside the metal and speed up the calculations. Surface plasmon polaritons (SPPs) and excitons can coexist in these structures and coupled SPP-exciton modes can be formed. The coupling allows to transfer energy from pumped excitons into SPP modes. This compensates the large SPP losses. We discuss the resulting enhancement of SPP life times and propagation lengths.