Abstract
Mapping the Polarization Pattern of Plasmon Modes Reveals Nanoparticle Symmetry
Highlights
Single molecule labeling, cancer treatment, enhancement of non-linear optical effects, or light guiding have demanded much attention from the scientific community, and as a possible solution, plasmon resonances of noble metal nanoparticles are explored
‘‘We have developed a new microscope setup (RotPOL), which allows obtaining polarization-dependent scattering spectra in a fast and easy way,’’ Olaf Schubert continues explaining to Nano Spotlight. ‘‘RotPOL uses a wedge shaped quickly rotating polarizer which splits the light of a point source into a ring in the image plane, encoding the polarization information in a spatial image.’’ (Scheme 1)
‘‘With the RotPOL setup, we study plasmon modes of a large variety of plasmonic structures—from rod-shaped particles to triangles, cubes, and pairs of spheres,’’ said Olaf Schubert. ‘‘Each plasmonic particle has a characteristic ‘footprint’, which allows deducing the approximate particle shape from the polarization-dependent single-particle scattering spectra
Summary
Cancer treatment, enhancement of non-linear optical effects, or light guiding have demanded much attention from the scientific community, and as a possible solution, plasmon resonances of noble metal nanoparticles are explored. Mapping the Polarization Pattern of Plasmon Modes Reveals Nanoparticle Symmetry At different wavelengths of the excitation light, different oscillation modes are excited making it important to know the polarization pattern as a function of wavelength.
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