Title :
Modal Analysis of Nanoplasmonic Multilayer Spherical Resonators
Author_Institution :
Sch. of Eng. & Technol. ET, Central Michigan Univ., Mount Pleasant, MI, USA
Abstract :
The resonance wavelengths, quality factors, and electromagnetic field profiles of multilayered metal plasmonic nanospheres are presented. Quantitative results are obtained using a recently developed finite-difference time-domain algorithm suited for structures with spherical invariance. The resonance modes of multilayered metal plasmonic nanospheres are explained as hybrid modes consisting of surface plasmon polariton resonances associated with each metal-dielectric interface. Multilayered metallic nanospheres exhibit complicated and numerous modes as the number of layers increases; however, the highest quality factor hybrid modes are those associated with the odd-like modes of each individual metal layer. Applications in nanoplasmonic lasers are highlighted.
Keywords :
finite difference time-domain analysis; metal-insulator boundaries; multilayers; nanostructured materials; plasmonics; polaritons; resonators; surface plasmon resonance; electromagnetic field profiles; finite difference time-domain algorithm; metal plasmonic nanospheres; metal-dielectric interface; modal analysis; multilayered metallic nanospheres; nanoplasmonic lasers; nanoplasmonic multilayer spherical resonators; quality factor hybrid modes; quality factors; resonance modes; resonance wavelengths; spherical invariance; surface plasmon polariton resonances; Gold; Nonhomogeneous media; Permittivity; Plasmons; Q factor; Resonant frequency; Nanocavities; plasmonics; subwavelength structures; theory and design;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2011.2163388
