| Budget Amount *help |
¥23,790,000 (Direct Cost: ¥18,300,000、Indirect Cost: ¥5,490,000)
Fiscal Year 2019: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2018: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
We proposed a terahertz complex modulator based on photo induced carriers, which is applicable to constructing terahertz phase arrays. Specifically, we analyzed the complex modulation effect involved by the photo excitation on a high-resistivity silicon substrate in a TE mode waveguide and confirmed agreement with the experimental results. We also confirmed trade-off between the amount of the phase shift and transmission loss. The transmission loss becomes 0.5 dB/mW for a sample of 10 mm long and the phase shift reaches 44 degree when irradiating 30.6 mW, both at 300 GHz. Moreover, we also proposed a novel method of modulating the effective index inside a TE mode waveguide by slightly tilting the plate. Experiment demonstrates that the beam trajectory can be deflected inside the waveguide, which is useful for terahertz beam steering.
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