| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
In order to realize an ultrafast wavelength-conversion device, we investigated nonlinear responses of a semiconductor multi-layer triple-coupled cavity with quantum dots (QDs) and crystal growth of the structure. We obtained ultrafast nonlinear transmission change of a cavity with the Er-doped quantum dots embedded in a thin strain-relaxed layer. We also found that the wavelength conversion signal by the four-wave-mixing was absorbed in the QDs, although degenerate four-wave-mixing signals were clearly observed due to saturable absorption. In the case of a triple-coupled cavity with QDs which were transparent for the incident lights, wavelength conversion signals were clearly observed. We confirmed that the triple-coupled cavity structure with QDs was promising for application to ultrafast wavelength-conversion devices.
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