Angle-Resolved Plasmonic Properties of Single Gold Nanorod Dimers.

ABSTRACT: Through wet-chemical assembly methods, gold nanorods were placed close to each other and formed a dimer with a gap distance ~1 nm, and hence degenerated plasmonic dipole modes of individual nanorods coupled together to produce hybridized bonding and antibonding resonance modes. Previous studies using a condenser for illumination result in averaged signals over all excitation angles. By exciting an individual dimer obliquely at different angles, we demonstrate that these two new resonance modes are highly tunable and sensitive to the angle between the excitation polarization and the dimer orientation, which follows cos² φ dependence. Moreover, for dimer structures with various structure angles, the resonance wavelengths as well as the refractive index sensitivities were fo

SUBMITTER: Wu J 

PROVIDER: S-EPMC6223963 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature