| Budget Amount *help |
¥21,450,000 (Direct Cost: ¥16,500,000、Indirect Cost: ¥4,950,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Outline of Final Research Achievements |
I developed a near-field spectroscopy towards extreme spatio-temporal control using visible~near infrared light source. For the extreme temporal resolution, I employed degenerated four wave mixing (FWM), which is one of the third order nonlinear processes. Near infrared broadband pulse is focused onto a near-field probe and I found that a broadband FWM is generated from the tip. By taking the autocorrelation of the generated pulse from the tip, it was found that the pulse has a time duration of ~10fs, which suggested that near-field time-resolved spectroscopy is possible with the nano light source. For the extreme spatial resolution, I developed a home-built scanning tunneling microscope (STM) specifically for near-field spectroscopy. By optimizing environmental condition of the STM, 1.7nm spatial resolution was achieved by STM based tip-enhanced near-field Raman spectroscopy. The achieved spatial resolution is the world highest spatial resolution in optical spectroscopy in ambient.
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