| Budget Amount *help |
¥40,560,000 (Direct Cost: ¥31,200,000、Indirect Cost: ¥9,360,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2016: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2015: ¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
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| Outline of Final Research Achievements |
We have studied basic techniques to develop a mHz-level laser using cold strontium atoms in an optical lattice. As a first step to this goal, we develop a simple technique for laser cooling of strontium. We experimentally proved that a hollow cathode lamps, which is originally designed for spectroscopy of the ground state atoms, can offer a Doppler-free spectroscopic signal for the excited states of strontium. Moreover, by applying an appropriate magnetic field to the hollow cathode lamp, we could obtain an error signal suitable for laser frequency stabilization. Finally, we have developed a technique to magneto-optically trapping strontium atoms an a glass cell without resorting a Zeeman slower, which is a significant simplification of vacuum apparatus.
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