Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.11: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Optical Properties of Self-assembled Fluorescent and Metal Nanoparticle Arrays — •Franziska Barho, Mario Fey, and Peter J. Klar — Justus-Liebig-Universität Giessen, Germany

Localized plasmons in metal nanoparticles may influence the photoluminescence of adjacent fluorescent nanoparticles. Depending on the distance between the different nanoparticles, an enhancement of the photoluminescence signal as well as its quenching is possible. The influence caused by different arrangements of nanoparticles is going to be investigated.

The samples were prepared by electron beam lithography defining cavities in PMMA resist. Both types of nanoparticles, in our case gold particles, whose plasmon resonance frequency is located in the visible part of the spectrum, and fluorescent polystyrene spheres, were then placed into these structures by a horizontal dip coating process. With this self-assembling process, different arrangements of particles can occur which allow us to study their optical properties like the transmission and photoluminescence characteristics.