2012 Fiscal Year Final Research Report
Development of near-field vibrational stark spectroscopy
| Project/Area Number |
23760051
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
YANO Takaaki 東京工業大学, 大学院・総合理工学研究科, 助教 (90600651)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 光計測 / 近接場光学 |
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| Research Abstract |
We have developed a near-field Raman spectroscopic system by combining conducting atomic force microscopy with Raman spectroscopy. Near-field probe tips were fabricated by coating silicon dioxide cantilevers with silver thinfilms via the thermal evaporation method, which enabled us to have efficient tips with both conductivity and high field enhancement. We have also demonstrated subnanometric stabilization of the near-field Raman spectroscopic system under ambient condition. Time-dependent thermal drift of near-field probes was optically sensed at subnanometre scale, and was compensated in real-time. Using the developed system, vibrational stark tuning rate of 4 cm-1/V with 1-propanethiol molecules was demonstrated, which shows the capability of controlling molecular structures and functions on a nanometer scale.
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