24 October 2012 Grating coupler excitation of membrane supported long range surface plasmons
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Proceedings Volume 8412, Photonics North 2012; 841212 (2012) https://doi.org/10.1117/12.2000466
Event: Photonics North 2012, 2012, Montréal, Canada
Abstract
The design of gratings for broadside coupling of a Gaussian beam to a long-range surface plasmon polariton (LRSPP) waveguide is explored. The waveguide is a gold (Au) slab supported by a thin Cytop membrane bounded by air and forms a waveguide structure for potential use as a gas sensor. Grating coupler designs are proposed and modeled in two dimensions using the finite element method (FEM). A large design space of varying grating dimensions and input positions is examined and the resulting simulations predict an input coupling efficiency of approximately 29%. Fabrication of these gratings is also examined through standard optical lithography.
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Norman R. Fong, Pierre Berini, R. Niall Tait, "Grating coupler excitation of membrane supported long range surface plasmons", Proc. SPIE 8412, Photonics North 2012, 841212 (24 October 2012); doi: 10.1117/12.2000466; https://doi.org/10.1117/12.2000466
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