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23 April 2008 Dielectric surface plasmon Bragg mirrors: theory, design, and properties
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Surface plasmon based photonic devices are promising candidates for highly integrated optics. An important effort in the development of these devices is dedicated to the design of systems allowing the two dimensional control of surface plasmon (SPP) propagation. Recently, it has been shown that Bragg mirrors consisting of gratings of metallic lines or indentations on a metallic surface are very efficient tools to perform this task. Alternatively, using structured dielectric layers on top of the metallic layer to build SPP optical elements based on the effective refractive index contrast has been lately demonstrated. This kind of elements relies on the same principles as conventional optical elements. Here we analyze the ability of gratings of dielectric ridges deposited on a metallic layer to act as dielectric SPP Bragg mirrors. The dispersion relation of these systems shows the presence of a gap whose position can be approximately predicted by the same relation as for standard optical Bragg mirrors. The properties of these dielectric based SPP Bragg mirrors have been examined as a function of several structural grating parameters. The obtained results have been experimentally confirmed by means of Fourier plane leakage radiation microscopy.
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Sukanya Randhawa, María Ujué González, Jan Renger, Jean-Claude Weeber, and Romain Quidant "Dielectric surface plasmon Bragg mirrors: theory, design, and properties", Proc. SPIE 6988, Nanophotonics II, 69880U (23 April 2008);

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