| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2013: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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| Outline of Final Research Achievements |
Photon upconversion using a novel quantum structure which we call quantum well islands (QWIs) has been investigated. Data supporting our former speculation that Auger process being the dominant mechanism responsible for upconversion have been obtained. Upconverted carriers have also been successfully detected as photocurrents (PCs). In combination with photoluminescence (PL) measurements with multiple beam excitation, the carrier dynamics have been discussed. Further, it has been shown that QWI is not only effective for supplying an intermediate state for IR to visible conversion but also for supplying a stable state, which may help improving upconversion efficiency in various structures.
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