Abstract
For periodically corrugated nanowire cross sections, such that the polar-angle dependence of the radius is , we calculate both the resonant values of metal permittivity and the corresponding plasmonic eigenfunctions. For sufficiently small perturbation amplitudes, , these fundamental characteristics admit full-scale analytical analysis revealing nontrivial plasmonic properties. For , the analytical analysis is supplemented by numerical simulations; they show nonlinearly growing redshifts of the main plasmonic resonances with increasing modulation periodicity and the amplitude .
© 2012 Optical Society of America
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