| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In this study, high density exciton-polariton condensation was investigated. Photoluminescence (PL) by time-resolved spectroscopy in the regime far above condensation threshold (~100 times) was observed. PL showing lower polariton energy at low densities gradually shifted toward higher energy closing to a cavity photon energy as density goes up, and a new higher energy PL peak appeared. The PL dynamics was investigated by theoretical calculations. In addition, we studied the reason of the nonexistence of a lower energy peak which had been expected while there exists a higher energy peak and found that nonequilibrium feature of the exciton-polariton system leads to the observed unbalance in the relative brightness of sidebands. The experimental and theoretical investigations led us to a conclusion that electron-hole binding in the high density regime still seems to exist.
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