Инд. авторы:	Sturman B.I., Podivilov E.V., Gorkunov M.V.
Заглавие:	Plasmons localized at nanoscale perturbations of flat metal surface
Библ. ссылка:	Sturman B.I., Podivilov E.V., Gorkunov M.V. Plasmons localized at nanoscale perturbations of flat metal surface // Journal of the Optical Society of America B: Optical Physics. - 2014. - Vol.31. - Iss. 7. - P.1607-1613. - ISSN 0740-3224. - EISSN 1520-8540.
Внешние системы:	DOI: 10.1364/JOSAB.31.001607; SCOPUS: 2-s2.0-84903728293; WoS: 000338931700028;
Реферат:	eng: We study the properties of plasmonic excitations localized at 2D and 3D nanoscale perturbations of a flat metal surface within the general method of surface integral equations. The resonant values of the optical permittivity epsilon(j) and the plasmonic eigenfunctions-distributions of the surface charge density sigma(j)(r)-are investigated. General symmetry properties linking the cases of convex and concave perturbations (bumps and mirror-reflected pits) are established. The impact of the height-to-width perturbation ratio h(0)/r(0) on the localized surface plasmons is twofold: while the resonant permittivities epsilon(j) drop linearly with h(0)/r(0) leading to strong redshifts of the resonances, the scale of localization stays constant (approximate to r(0)). The presence of sharp shape features (tips and corners) with the curvature radius p(0) << r(0) leads to superlocalization of charge density on the scale of rho(0) and, simultaneously, to an additional strong drop of epsilon(j). (C) 2014 Optical Society of America
Ключевые слова:	EXCITATIONS; FILMS; SHAPE RESONANCES; POLARITONS; SCATTERING;
Издано:	2014
Физ. характеристика:	с.1607-1613