Open AccessComplex relaxation rates of the Drude metals and their effects on the lifetime and symmetry of plasmon resonances
Author(s) -
Hyoung-In Lee,
El-Hang Lee
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.010410
Subject(s) - drude model , plasmon , planar , surface plasmon , dispersion (optics) , dispersion relation , condensed matter physics , physics , symmetry breaking , optics , dielectric , symmetry (geometry) , surface plasmon polariton , relaxation (psychology) , group velocity , surface plasmon resonance , quantum mechanics , psychology , social psychology , computer graphics (images) , geometry , mathematics , computer science , nanoparticle
The Drude model for metal is extended to include complex relaxation rates. As a test for what happens to the surface plasmon resonances with such metals, the lifetime is examined for propagating waves across a single planar metal-dielectric interface. By analytically solving the dispersion relation being fourth-order in the complex frequency, group-velocity dispersion and quality factors are explicitly found. Due to the symmetry breaking between the forward and backward waves, standing waves are not allowed in general.