Imaging Spectral Detection of Single Gold Nanorod Based on Polarization-Controlled Excitation

Single gold nanorod of length 45.5 nm is detected under a home-built hyperspectral imaging system based on a polarization-controlled waveguide excitation scheme compared with the dark-field excitation and the simulation. The detected spectral intensities at the resonance wavelengths reveal the polarization-induced dipole characteristics along the rod geometries.