We describe how the finite-difference time-domain (FDTD) technique can be used to compute the quasi-normal mode (QNM) for metallic nano-resonators, which is important for describing and understanding light–matter interactions in nanoplasmonics. We use the QNM to model the enhanced spontaneous emission rate for dipole emitters near a gold nanorod dimer structure using a newly developed QNM expansion technique. Enhanced single photon emission factors of around 1500 and output β-factors of around 60% are found near the localized plasmon resonance.
© 2014 Optical Society of America
Original Manuscript: May 26, 2014
Manuscript Accepted: June 9, 2014
Published: July 15, 2014
Vol. 9, Iss. 9 Virtual Journal for Biomedical Optics
Rong-Chun Ge and S. Hughes, "Design of an efficient single photon source from a metallic nanorod dimer: a quasi-normal mode finite-difference time-domain approach," Opt. Lett. 39, 4235-4238 (2014)