Figure 3
Results of spectroscopic Mueller matrix measurements on single isolated Au nanorod.
(a) SEM image of Au nanorods. (b) Dark-field image of a single Au nanorod. (c) Typical scattering spectra (with un-polarized excitation, corresponding to M11(λ) element) recorded from the Au nanorod exhibits two distinct peaks corresponding to the two (transverse and longitudinal) electric dipolar plasmon resonances. (d) The spectral scattering Mueller matrices M(λ) of the Au nanorod exhibit characteristic features of the constituent elementary polarimetry properties - depolarization reflected in the diagonal elements (black); diattenuation in the first row and column (blue); linear retardance in the off-diagonal elements of the lower 3 × 3 block (red). (e,f) The wavelength dependence of the decomposed(using Eq. 3) basis matrices encoding the depolarizing (in depolarization matrix −MΔ(λ)) and the non-depolarizing (in diattenuating retarder matrix-MDR(λ)) effects. All the matrices are shown in normalized unit (normalized by M11(λ)).
