| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
Optical control of material functions is important for efficient energy use. In this project, we proposed to establish novel excitation schemes to control functions of nanomaterials. For this purpose, we developed an ultrafast nano-imaging method by combining ultrafast spectroscopy with a near-field optical microscope. By using this method, we visualized spatio-temporal dynamics of elementary excitations in gold nanostructures and found that spatial features of the excited states undergo ultrafast periodic oscillations. We also examined optical properties of gold nanoparticle assemblies, and found that unique optical properties are induced due to plasmon-plasmon interactions. The results indicate that optical properties of gold nanoparticle assembly can be controlled by the phase-modulation of excitation pulse and tuning of plasmon-plasmon interactions. The methods above can be extended to various nanosystems, and open up new route for optical control of material functions.
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