| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In a periodic array of coaxial metallic nanoholes, in which a metallic core is introduced at the center of a hole of about 100 nanometers in diameter in a thin metallic film, the band structure of the resonant state can be significantly changed by changing the Fabry-Perot resonance condition in the nanoholes by changing the metal film thickness. Furthermore, we have shown that the vortex structure appearing in the polarization of radiation from the resonant state can be changed by band inversion. This topological change is caused by the generation and annihilation of exceptional point pairs with a polarization vortex whose winding number is 1/2.
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