| Project/Area Number |
17K05130
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Quantum beam science
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Nakao Hironori 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 准教授 (70321536)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 光渦 / 放射光 / 軌道角運動量 / 共鳴X線散乱 / コヒーレンス / 共鳴Ｘ線散乱 |
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| Outline of Final Research Achievements |
Vortex beam carrying orbital angular momentum is noted to have a helical wavefront and a doughnut-shaped beam intensity distribution due to a phase singularity at the center of the beam. In this study, we have tried to generate the vortex beam by several methods in soft x-ray energy region, and succeeded in detecting a helical phase distribution of the vortex beam utilizing the inline-holography technique. We also elucidated that this technique becomes an effective probe for the characterization of topological defects in spin-textures.
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| Academic Significance and Societal Importance of the Research Achievements |
「光渦」ビームは、光ピンセット、ナノ加工、量子情報分野での量子ビットへの利用など、様々な可能性を秘めている。本研究では、光渦ビームを複数の方法で生成を試み、その利用に向けた評価を進めた。この生成した光渦ビームの評価を通じて、磁性体中のトポロジカル欠陥構造の新たな観測法を見い出した。このように新たな光渦ビームの生成・利用の技術の進展により、当初考えもしなかった研究展開が、今後も期待される。
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