Title :
Plasmon dynamics in a metal nanoslit
Author :
Wuenschell, Jeff ; Kim, Hong Koo
Author_Institution :
Univ. of Pittsburgh, Pittsburgh
Abstract :
We present an analytical study of the dynamic interplay among surface plasmon polarization charges, electromagnetic fields, and energy flow in the metal/dielectric interface and metal nanoslit structure. Particular attention is given to the regime where the energy flow in the metal side is significant compared to that in the dielectric side. The study reveals that a vortex-like circulation of energy is an intrinsic feature of surface plasmon propagation supported by a metal/dielectric interface, and, in general, a vortex can form when the permittivity and permeability values of the materials involved satisfy the following condition: {(epsivm /epsivd ) < -1 and (mum /mud ) > -1} or {(epsivm /epsivd ) > -1 and (mum /mud ) < -1}.
Keywords :
electromagnetic fields; metals; nanostructured materials; permittivity; surface plasmons; dynamic interplay; electromagnetic fields; energy flow; metal nanoslit; metal-dielectric interface; permeability; permittivity; plasmon dynamics; surface plasmon polarization charges; vortex-like circulation; Attenuation; Dielectric constant; Dielectric losses; Dielectric materials; Dielectric thin films; Electrons; Optical films; Optical surface waves; Optical vortices; Plasmons; metal nanoslits; plasmons;
Conference_Titel :
Nanotechnology Materials and Devices Conference, 2006. NMDC 2006. IEEE
Conference_Location :
Gyeongju
Print_ISBN :
978-1-4244-0541-1
Electronic_ISBN :
978-1-4244-0541-1
DOI :
10.1109/NMDC.2006.4388858
