| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We research on higer order interaction between ultracold rubidium atoms and localized light by optical near-field. It is necessary to establish the observation system of higer-order interaction, namely optical forbidden transitions, of cold atoms near the dielectric surface. We succeed the observation of emission from trapped cold atoms via optical forbidden and optical-optical double resonant transitions. Due to change different wavelength of emission from excitations, the observed emission indicate to be improved signal-to-noise ratio in spite of weaker transition in serveral orders of magnetude in comparison with allowed ones. In view of theoretical reserach, we calculate transition probabilities of optical forbidden transitions near a nanoedge, and the results show highly enhancement of transisions in several orders of magnitude due to high-order interactions. In our experiment, we confirm several factor magnification of forbidden transitions of oxygen molecules near nano-edges.
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