| Project/Area Number |
26620062
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Functional solid state chemistry
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 高次多光子反応 / フェムト秒レーザー顕微鏡 / フォトクロミック反応 / 超解像 / レーザー光化学 / 反応スイッチング |
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| Outline of Final Research Achievements |
In this research project, we constructed a laser confocal-microscope allowing photoexcitation of a small area in samples at sub-100 fs pulse duration in the near infrared region. By using the microscope, we selectively induced the decoloration (two-photon process) and coloration (three-photon process) of diarylethene derivatives only by changing the intensity of incident light pulse. We also conducted numerical calculations, confirming that the reactions are safely ascribed to the two-photon and three-photon absorptions. Through these investigations we successfully demonstrated the universality of one-color multiphoton reversible switching of photochromic reactions.
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