| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2015: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
We have investigated the characteristics of exciton-polariton condensation in originally-prepared copper-halide microcavities with the use of photoluminescence (PL) spectroscopy. In CuBr microcavities, we realized the polariton condensation in the temperature range from 10 to 140 K and confirmed that an excitation power density at the condensation threshold is controlled by a detuning value corresponding to the energy difference between the exciton and cavity photon. Moreover, it was quantitatively revealed that the dispersion relation of polariton condensates exhibits a non-dispersive profile peculiar to nonequilibrium condensation: the so-called diffusive Goldstone mode. In addition, we found in the PL dynamics that the PL rise and decay times are dramatically shortened by the polariton condensation, which reflects the bosonic final state stimulation.
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