| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
The purpose of this research project is to improve performance of terahertz quantum cascade lasers which are expected as compact coherent light sources in the terahertz region. We have numerically investigated both active-region structures to create higher gain and waveguide structures to improve thermal and optical properties. As a result, we have proposed an optimum active-region structure and a new waveguide design for improving the performance of the terahertz quantum cascade lasers. Furthermore, we have investigated lasing characteristics experimentally by optical injection method to gain insights into dynamics in the terahertz quantum cascade lasers.
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