Quantitative experimental determination of scattering and absorption cross-section spectra of individual optical metallic nanoantennas.
Antennas convert propagating radiation to localized electromagnetic energy and to heat. To unambiguously separate between these two aspects, one needs to quantitatively determine the antenna scattering and absorption cross-section spectra. By using a spatial modulation technique combined with a common-path interferometer and lithographically fabricated individual gold nanoantennas, we experimentally determine the scattering and absorption cross-section spectra of different optical antennas simultaneously and quantitatively for the first time.
Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany. martin.husnik@kit.edu
Martin
M
Husnik
Stefan
S
Linden
Richard
R
Diehl
Jens
J
Niegemann
Kurt
K
Busch
Martin
M
Wegener