| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
The main results of this research project were the measurement of single photons from a site controlled GaN nanowire quantum dot at an ambient temperature of 350K (77C). The emsission itself was measured up to temperatures of 400K, but the intensity was too low to perform autocorrelation measurements. This was the result of a sharp decrease in emission intensity at temperatures above 300K (the origin of which is not fully clear at present). The phonon-induced linewidth broadening was also investigated from 4K to 400K (and the rate of broadening was compared to other materials). At temperatures above 200K phonon wings begin to dominate the emission spectrum, and the linewidth rapidly broadens to values of ~40meV. The phonon interactions are strong in GaN due to the existence of both deformation potential and piezoelectric coupling mechanisms.
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