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Micro/nano photonic structures permit remarkable control of the propagation of light.A selection of recent results will be presented.Using two-dimensional photonic crystal made of the composite materials with large and fast third-order optical nonlinearity,ultrafast and low threshold all-optical switching was demonstrated.Based on tunable Fano resonance or PIT of metallic nanostructures,ultrafast modulations on light transmission were also experimentally demonstrated.Moreover,ultracompact plasmonic devices including SPP unidirectional generator,splitter and switch were experimentally demonstrated.