Fig. 2. Development of bidirectional LSPR through the gold deposition process. (a) Spectroscopic ellipsometry (SE) of the imaginary part of the effective dielectric function 〈ε2〉 for polarization parallel (E⃑∥, red) and perpendicular (E⃑⊥, blue) to the nanoparticle chains. Solid and dashed lines for spectra with and without deposited CoPc molecules as Raman probe. The Raman excitation laser line of 632.8 nm is indicated. (b) Raman spectra at the same thicknesses corresponding to SE spectra in each column. Raman signal for different laser polarization E⃑∥ (red) and E⃑⊥ (blue) are shown.
