| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Outline of Final Research Achievements |
We investigated the ultrafast motion of electrons and holes under bias electric field in conjugated polymers, which are major organic semiconductors, on the basis of emitted terahertz waveforms. When several conjugated polymer films with different main chains were excited by femtosecond laser pulses, the obtained terahertz signals were found to have the same order of magnitude and quite similar shapes. This means that the ultrafast motion is common to the conjugated polymers. A detailed analysis of terahertz waveforms revealed that the polarization relevant to terahertz emission is created by electron-hole pairs and quenched on the time scale of less than 350 fs.
|
