Abstract
We propose a plasmonic device consisting of a concentric ring grating acting as an efficient tool for directional launching and detection of surface plasmon polaritons (SPPs). Numerical simulations and optical characterizations are used to study the fabricated structured gold surface. We demonstrate that this circularly symmetrical plasmonic device provides an efficient interface between free space radiation and SPPs. This structure offers an excellent platform for the study of hybrid plasmonics in general and of plasmon-emitter couplings in particular, such as those occurring when exciting dye molecules placed inside the ring. As illustrated in this work, an interesting property of the device is that the position of excitation determines the direction of propagation of the SPPs, providing a flexible mean of studying their interactions with molecules or dipole-like emitters placed on the surface.
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Acknowledgments
The authors would like to thank A. Bruyant and G. Colas des Francs for the helpful discussions, as well as S. Kostcheev for the technical support for the fabrication. N.R. would like to thank the French Ministry of Education for her PhD grant. The authors thank the region Champagne-Ardenne platform Nanomat for fabrication and characterization facilities. C.C. and S.B. would like to acknowledge the financial support by the CNRS PEPS project “InteQ.” C.C. thanks the partial funding by the Champagne-Ardenne region via the project “NanoGain” and S.B., R. S.-M., and C.C. thank the partial support by the French ANR via the project “SINPHONIE.” The work of S. de la C. and E.R.M. was supported in part by CONACYT, under grant 180654.
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Rahbany, N., Geng, W., Salas-Montiel, R. et al. A Concentric Plasmonic Platform for the Efficient Excitation of Surface Plasmon Polaritons. Plasmonics 11, 175–182 (2016). https://doi.org/10.1007/s11468-015-0032-1
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DOI: https://doi.org/10.1007/s11468-015-0032-1