Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Plasmonics and Nanooptics

O 36.16: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster A

IR Microscopy: Spectra-Structure Correlations in Plasmonic Metamaterials and Hybrid Surfaces — •Timur Shaykhutdinov, Thomas W. H. Oates, Andreas Furchner, and Karsten Hinrichs — Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Department Berlin, Schwarzschildstraße 8, 12489 Berlin, Germany

Anisotropic plasmonic metamaterials, organic-inorganic hybrid surfaces, and thin organic films and interfaces are of high importance for applications in the field of nanotechnology and in the design of structure-resolving biosensors, photonic and optoelectronic devices. A fundamental requirement to this end is a detailed characterization of their structural properties and fundamental interactions, which induce and control their unique macroscopic optical response.

For a comprehensive understanding of structure- and heterogeneity-induced effects of these novel materials in the fingerprint region, both far- and near-field optical measurement concepts with high sensitivity and lateral resolution are required. Current methods include generalized ellipsometric IR microscopy (developed at the ISAS Berlin) and nanoscale IR microscopy based on photothermal induced resonance (PTIR), a technique also referred to as AFM-IR.

In combination with new measurement concepts, optical calculations (e.g. using rigorous coupled-wave analysis (RCWA), finite-difference time-domain method (FDTD)) of both the electromagnetic far- and near-fields are essential to avoid incorrect spectral assignments and unphysical conclusions.