Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 26: Plasmonics and nanooptics II

O 26.6: Vortrag

Dienstag, 27. März 2012, 11:45–12:00, MA 005

Quantitative measurement of scattering and absorption cross-sections of individual nano-objects — •Martin Husnik¹, Stefan Linden^2,3, Richard Diehl⁴, Jens Niegemann⁴, Kurt Busch^4,5, and Martin Wegener^1,3 — ¹Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — ²Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany — ³Institut für Nanotechnologie, Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany — ⁴Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — ⁵Institut für Physik, Humboldt-Universität zu Berlin, and Max-Born-Institut, 12489 Berlin, Germany

The physics and applications of nanostructures are a rapidly growing field of research in photonics. Determining the scattering and absorption cross-sections of individual particles quantitatively would significantly increase the understanding of the optical properties of nanoparticles.

Here, we combine a previously developed spatial modulation technique with a polarization-sensitive common-path interferometer. This enables the simultaneous measurement of both the absolute scattering and absorption cross-sections of single particles. Example spectra of individual straight antennas, split-ring resonators, and intermediates will be presented and compared with numerical calculations based on a Discontinuous Galerkin Time-Domain (DGTD) approach.