Berlin 2005 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Halbleiterphysik

HL 58: Poster IIb

HL 58.58: Poster

Dienstag, 8. März 2005, 16:30–19:00, Poster TU F

Infrared behaviour and plasmon properties of single metal nanowires — •Torsten Kolb¹, Maria Eugenia Toimil Molares², Thomas Cornelius², Florian Kost¹, Robert Lovrincic¹, Reinhard Neumann², Annemarie Pucci¹, and Gerhard Fahsold¹ — ¹Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, D-69120 Heidelberg — ²Gesellschaft für Schwerionenforschung (GSI), Planckstraße 1, D-64291 Darmstadt

We investigate the IR-optical properties of single metal (Cu) nanowires. The wires were prepared by template directed growth of Cu in etched ion tracks in polycarbonate membranes. We dispersed these wires on IR-transparent substrates by dissolving the membranes. For IR spectroscopy we used the synchrotron radiation source ANKA at the Forschungszentrum Karlsruhe. Investigations of broadband IR-optical properties in the range from 600 cm⁻¹ to 6000 cm⁻¹ of single nanowires were done by performing IR-microscopy in transmission with an IR-beam of about 8.3 micrometer width. For few-micrometer long Cu wires we observed antenna-like plasmon resonances dependent on size and shape of the wires. By varying polarisation of the incident beam we proved that an electric field component parallel to the wire is necessary for an excitation of these resonances.

Project ist supported by DFG (SPP 1165)