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Frequency dependent power efficiency of a nanostructured surface plasmon coupler
Author(s) -
Ghoshal Amitabh,
Kik Pieter G.
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.201004258
Subject(s) - excitation , grating , materials science , surface plasmon , plasmon , localized surface plasmon , surface plasmon polariton , spectroscopy , nanoparticle , optoelectronics , optics , coupling (piping) , nanotechnology , physics , quantum mechanics , metallurgy
Surface plasmon (SP) excitation on an extended thin metal film via a miniature nanoparticle‐enhanced grating coupler is studied experimentally using leakage radiation spectroscopy. A universally applicable method for determining the efficiency of free‐space SP excitation is developed, and the efficiency of the coupler is determined. Two distinct grating excitation modes are observed, as well as a particle‐mediated excitation mode. The maximum observed coupling efficiency of the structure was approximately 3.5% at 615 nm and 670 nm, corresponding to the two grating modes of the structure. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)