| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
In high-density electron-hole systems, many-body interactions such as an Auger recombination process which accompanies non-radiative recombination play an essential role in determining the carrier dynamics. We experimentally pursued thermalization dynamics of excitons and free carriers by using spectroscopic methods covering a wide spectral range. We have succeeded in establishing the nanosecond time-resolved cyclotron resonance method which probes free carriers produced by optically excited excitons in an oxide semiconductor, and find out correlation between the free and trapped excions at the vacancy state. This made it possible to quantitatively discuss formation dynamics of free carriers via two-body collisions of excitons.
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