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Perturbation theory for plasmonic eigenvalues | | Daniel Grieser
; Hannes Uecker
; Svend-Age Biehs
; Oliver Huth
; Felix Rüting
; Martin Holthaus
; | | Date: |
27 Mar 2011 | | Abstract: | We develop a perturbative approach for calculating, within the quasistatic
approximation, the shift of surface resonances in response to a deformation of
a dielectric volume. Our strategy is based on the conversion of the homogeneous
system for the potential which determines the plasmonic eigenvalues into an
inhomogeneous system for the potential’s derivative with respect to the
deformation strength, and on the exploitation of the corresponding
compatibility condition. The resulting general expression for the first-order
shift is verified for two explicitly solvable cases, and for a realistic
example of a deformed nanosphere. It can be used for scanning the huge
parameter space of possible shape fluctuations with only quite small
computational effort. | | Source: | arXiv, 1103.5212 | | Services: | Forum | Review | PDF | Favorites | |
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