| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
An experimental and theoretical study of the dynamics of femtosecond surface plasmon wave packets interacting with metal-insulator-metal (MIM) nanocavities (NCs), which are typical meta-atoms for constructing metasurfaces in the near-infrared region, has been performed. The wave packet exhibits a shift of up to ± several μm in the intensity peak position after transmission through the MIM-NC. The amount of this shift can be continuously manipulated by controlling the eigen frequency of the MIM-NC or the chirp of carrier frequency of the wave packet. This effect corresponds to a manipulation of an "apparent group refractive index", which is defined from the "apparent group velocity" of the wave packet transmitting through the MIM-NC, in the range of -40 to 60.
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