| Budget Amount *help |
¥45,760,000 (Direct Cost: ¥35,200,000、Indirect Cost: ¥10,560,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2020: ¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
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| Outline of Final Research Achievements |
One of the most critical issues in terahertz systems is the significant loss in conventional metallic electronic-based circuits. In this study, we investigate the topological transport of terahertz waves using metal-free silicon photonic crystal waveguides, which are dielectric microstructures with a periodic refractive index distribution. Owing to the robustness of their topological properties, we successfully developed low-loss (0.015 dB/cm) terahertz waveguides with sharp bends (0.1 dB/bend) and terahertz multiplexers. Real-time transmission of uncompressed 4K high-definition videos and multilevel communications at a data rate exceeding 100 Gbit/s are demonstrated, thus indicating the potential of topological photonic crystals for use in advanced information communication technologies and terahertz science and technology.
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