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We demonstrate the design, simulation and experimental realization of a single-pixel aperiodic slit-groove plasmonic device that exhibits angle-selectable RGB color response at optical frequencies. The structure demonstrates high quality-factor and optical contrast with full-color RGB response. Surface plasmon polaritons (SPPs) are surface waves at a metal and dielectric interface resulting from the...
Fluorescence diffuse optical tomography is known to be a highly ill-posed problem. We demonstrate methods to exploit the nonlinearity of upconverting fluorophores to significantly improve the quality and amount of the input data. Furthermore, we show that it is possible to obtain reconstructions of higher resolutions using nonlinear fluorophores.
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