| Project/Area Number |
16K13696
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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 |
Optical engineering, Photon science
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | アンチストークス蛍光 / レーザー冷却 / 近接場光学 / 全反射減衰法 |
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| Outline of Final Research Achievements |
The purpose of this study is to propose an optical method for locally cooling the nanometer region in a liquid and to study parameters such as thermal diffusion and specific heat near the interface by experiment and simulation. For cooling, we used anti-Stokes fluorescence in Rhodamine 101 which is an organic dye molecule. The excitation efficiency was improved by limiting the excitation area using the total reflection attenuation method. As a result, it was shown that laser cooling can be performed using AS fluorescence from organic dye. The cooling rate was about 3.4 K in 3 hours. This is much smaller than the value expected from the theory under adiabatic conditions. This is because thermal diffusion is not taken into consideration.
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