| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Outline of Final Research Achievements |
We have investigated the enhancement of terahertz electromagnetic waves due to exciton quantum beat generated by difference frequency mixing excited by two continuous wave lasers in a semiconductor multiple quantum well. The maximum intensity was obtained by two continuous wave lasers with the energies of heavy-hole and light-hole excitons at room temperature. Generally, in the zincblende structure semiconductors, the oscillator strength of heavy-hole excitons is three times larger than that of light-hole excitons, so that the maximum intensity was expected at the heavy-hole exciton energy. However, in the experiment, the maximum intensity was obtained at the light-hole exciton energy, which suggests that it is possible to enhance the difference frequency mixing process by quantum beat.
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