2003 Fiscal Year Final Research Report Summary
Laser cooling of Chromium atoms for nanofabrication
| Project/Area Number |
13450030
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Osaka University |
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Principal Investigator |
INOUYE Yasushi INOUYE,Yasushi, 大学院・生命機能研究科, 助教授 (60294047)
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| Co-Investigator(Kenkyū-buntansha) |
SUN Hong-bo SUN,Hong-bo, 大学院・工学研究科, 助手 (10346190)
NAKAMURA Osamu NAKAMURA,Osamu, 大学院・生命機能研究科, 教授 (90192674)
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| Project Period (FY) |
2001 – 2003
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| Keywords | atom optics / Jl Bessel beam / nanotechnology / laser cooling / scattering force / transition metal / photonic control patterning / gradient force / Zeeman slowing |
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| Research Abstract |
We have established optical methods for controlling and manipulation of chromium atoms via radiation pressure, and have developed technology for fabrication of nanostructures using the methods. Especially, we achieved the methods using a laser diode which is suitable for industrial applications, and successfully fabricated one-dimensional periodic nanostructures (width : 150 nm, height : 6.7 nm, periodicity : 212.78 nm). This result was reported in SPIE's OE Magazine for its practicability. Furthermore, we developed elementary techniques, such as precise laser frequency control of which variation is less than 2 MHz. We also proposed guiding technology of atoms in light potential of J, Bessel beam which is formed by ring illumination optics or axicon prism. Deduced from numerical analysis of motion of atoms in the potential, atoms are well confined and guided in the beam. The numerical analysis also let us know the importance for reduction of broadening of atom velocity for fabricating finer structures. Then, we designed and developed a Zeeman slower which decelerates atoms efficiently.
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