| Budget Amount *help |
¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2012: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2011: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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| Research Abstract |
We have demonstrated that periodic nanostructure formation on dielectric, semiconductor, and metal surfaces irradiated with femtosecond laser pulses is dominated by the excitation of surface plasmon polaritons (SPPs), through the time-resolved measurements. Modeling the physical process of nanostructuring, we have developed a new ablation technique to control the excitation of spatial SPP wave modes and directly imprint a homogeneous nanograting on solid surfaces in air. It is also shown, based on the mechanism, that the nanograting period can be reduced by making use of shorter-wavelength lasers. Thus this project has successfully developed the fundamental principle and technique of a new nanoprocessing that can fabricate nanogratings with lasers beyond the diffraction limit.
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