| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2018: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Outline of Final Research Achievements |
A polaritonic device composed of distributed Bragg reflector pair and thin layer of organic semiconductor is prepared, and its optical characteristics are studied. The formation of polariton condensate is detected with excitation fluence above the threshold. Femtosecond UV pump-white light probe spectroscopy is applied for the same sample under the polariton condensation. The relaxation dynamics of the exciton and polariton states are observed.
Another strong coupling system called Bloch surface wave polariton, composed of a single DBR mirror and thin layer of organic semiconductor, is studied numerically. The relation between the Rabi splitting parameter and the distribution of electric field around the mirror surface is discussed.
A UV pump-THz probe technique is applied for a sub-micron size crystal of MAPbBr3 perovskite, and it is concluded that the thermal excitation from the exciton state to the bottom of the conduction band is not efficient in this material.
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