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Channel and wedge plasmon modes of metallic V-grooves with finite metal thickness
We investigate numerically the effect of a finite metal film thickness on the propagation characteristics of the channel plasmon polariton (CPP) and wedge plasmon polariton (WPP) modes, both in a symmetric and asymmetric environment. We observe that decreasing the metal thickness results in an improvement of the field localization near the groove tip and an increase of the losses for both types of mode. This behavior stems from the typical symmetric charge distribution of both modes across thedoi:10.1364/oe.17.002364 pmid:19219140 fatcat:bik7bbdjhbajda4ckn6rejpyzm