Waitz, Reimar

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Waitz
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Reimar
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Time-resolved optical measurement of thermal transport by surface plasmon polaritons in thin metal stripes

2014, Ganser, Andreas, Benner, Daniel, Waitz, Reimar, Boneberg, Johannes, Scheer, Elke, Leiderer, Paul

We investigate the thermal transport originating from the propagation of surface plasmon polaritons (SPPs) in a thin gold stripe. The SPPs are excited by a grating coupler on the Au stripe which was patterned onto a silicon membrane. The transmissivity changes of the Si membrane due to temperature-induced changes of the interference conditions enable measuring the temperature distribution with temporal and spatial resolution better than 1 μs and 1 μm. With this setup, we demonstrate that SPP excitation, propagation, and decay are accompanied by considerable heating and heat transport.