| Budget Amount *help |
¥41,080,000 (Direct Cost: ¥31,600,000、Indirect Cost: ¥9,480,000)
Fiscal Year 2018: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2017: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2016: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Fiscal Year 2015: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
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| Outline of Final Research Achievements |
HgCdTe have long been utilized for high-sensitivity detection of mid-infrared radiation in the wavelength range of 5-10 μm. However, their replacement with less toxic materials is demanded. In this study, GaAs/AlGaAs quantum well infrared photodetectors that are less toxic but have no responsivity for normal incident light are sandwiched between Au layers to form metasurfaces, and exhibited the maximum responsivity as high as 2.23 A/W (external quantum efficiency 39.4%) for unpolarized normal incidence at the wavelength of 7.0 μm, which is sufficient for practical application.
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