We investigate the surface plasmon polariton (SPP)-assisted interaction between two dipoles near a metal surface. The radiation energy from a dipole can excite SPPs and transport to another dipole through the channel of the localized SPP modes. This energy transfer can be much more efficient than direct energy transfer via dipole–dipole radiation interaction in free space. A simple analytical model is proposed to describe the underlying physics behind the influence of SPP on the dipole–dipole interaction energy, and it predicts a wide variety of complicated interaction features that agree well with rigorous calculations.
© 2011 Optical Society of America
Optics at Surfaces
Original Manuscript: January 26, 2011
Manuscript Accepted: April 13, 2011
Published: May 23, 2011
Fei Zhou, Ye Liu, and Zhi-Yuan Li, "Surface-plasmon-polariton-assisted dipole–dipole interaction near metal surfaces," Opt. Lett. 36, 1969-1971 (2011)