Figure 4. Scattering from collective plasmonic modes of assembled Ag nanorods.
a and b Scattering images, and the corresponding scattering spectra of Ag NRs densely assembled by 6 minutes irradiation of the azimuthally and radially polarized beams. c and d Calculated spectra of the total scattering from assembled Ag NRs by azimuthal and radial beams under the configuration obtained by Monte Carlo simulation on the left. The number of NRs is NNR = 36. Also, spectra of a single Ag NR, and a head-to-tail array of two or three Ag NRs (with 30 nm separations) are shown together. In each line, the rotational average in xy-plane was taken under linear polarized light (red vertical bars in watery line indicate standard deviation in rotational average).