We investigate the surface optical properties of a gold (Au) nanorod by using the finite-element method in a three-dimensional model. Results from the near-field optical images show spatially oscillatory patterns (nodal fields) on the surface, and these are attributable to plasmon-mode wave functions. We interpret these phenomena in terms of the electric field nodes on the surface of the rod, and the results show good agreement with our experimental observation in the optical images.
© 2009 Optical Society of America
Optics at Surfaces
Original Manuscript: August 29, 2008
Revised Manuscript: October 30, 2008
Manuscript Accepted: November 3, 2008
Published: January 16, 2009
Yuan-Fong Chau, Min Wei Chen, and Din Ping Tsai, "Three-dimensional analysis of surface plasmon resonance modes on a gold nanorod," Appl. Opt. 48, 617-622 (2009)