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Optimal tapers for compensating losses in plasmonic waveguides
Author(s) -
Davoyan Arthur R.,
Shadrivov Ilya V.,
Kivshar Yuri S.,
Gramotnev Dmitri K.
Publication year - 2010
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201004220
Subject(s) - tapering , plasmon , surface plasmon polariton , attenuation , amplitude , compensation (psychology) , optics , function (biology) , mode (computer interface) , materials science , surface plasmon , field (mathematics) , physics , optoelectronics , computer science , mathematics , psychology , computer graphics (images) , evolutionary biology , psychoanalysis , biology , operating system , pure mathematics
We consider propagation of surface plasmon polaritons in two‐dimensional tapered slot waveguides. We derive an analytical formula for the change of the amplitude of a plasmon mode due to tapering. We show that the taper leads to the field enhancement effectively compensating the mode attenuation due to losses. We obtain numerically the shape of the optimal function of the taper that provides exact loss compensation. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)