Quantitative Experimental Determination of Scattering and Absorption Cross-Section Spectra of Individual Optical Metallic Nanoantennas

  • Author:

    M. Husnik, S. Linden, R. Diehl, J. Niegemann, K. Busch, and M. Wegener 

  • Source:

    Phys. Rev. Lett. 109, 233902 (2012)

  • Date: 4.12.2012
  • Abstract:

    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.