Regensburg 2013 – scientific programme
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O: Fachverband Oberflächenphysik
O 63: Plasmonics and Nanooptics V
O 63.9: Talk
Thursday, March 14, 2013, 12:30–12:45, H38
The Role of the Scattering Phase in Single Particle Spectroscopy — •Christian Dicken1,2, Thorsten Schumacher1,2, Daniela Ullrich1,2, Klas Lindfors1,2, Harald Giessen2, and Markus Lippitz1,2 — 1Max Planck Institute for Solid State Research, Heisenberg Str. 1, 70560 Stuttgart, Germany — 24th Physics Institute, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
The continuously decreasing length scales in nanooptics and the trend towards single particle experiments requires powerful and highly sensitive measurement techniques. In many of these, such as homodyne amplification or when interferometers are used, the phase of light scattered by the nanostructure becomes important. In this talk we shed light on the properties of the scattering phase of metal nanoparticles in general and describe its strong influence on the optical response of the particle. We present an intuitive picture to understand the optical response of a metal nanoparticle as superposition of a dielectric and plasmonic contribution. Experimental data on interferometric detection of nickel nanoparticles is presented that clearly show the effects of the scattering phase and how it changes with particle size.