It is shown that a waveguide mode, which exists between metal dimer particles and does not cut off, produces an enhanced electric field and hence a mechanism for surface-enhanced Raman scattering. Structures can thus be designed that provide large average field enhancement over significant length scales.
© 2006 Optical Society of America
Original Manuscript: May 5, 2006
Manuscript Accepted: August 11, 2006
Published: October 26, 2006
Kevin J. Webb and Jia-Han Li, "Resonant waveguide field enhancement in dimers," Opt. Lett. 31, 3348-3350 (2006)