Grating coupler excitation of membrane supported long range surface plasmons

Norman R. Fong; Pierre Berini; R. Niall Tait

doi:10.1117/12.2000466

24 October 2012 Grating coupler excitation of membrane supported long range surface plasmons

Norman R. Fong, Pierre Berini, R. Niall Tait

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.

Citation Download Citation

Norman R. Fong, Pierre Berini, and R. Niall Tait "Grating coupler excitation of membrane supported long range surface plasmons", Proc. SPIE 8412, Photonics North 2012, 841212 (24 October 2012); https://doi.org/10.1117/12.2000466

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