2022 Fiscal Year Final Research Report
Research on high-efficiency and small-size nano-optical head for ultra-high density heat-assisted magnetic recording
| Project/Area Number |
19K04541
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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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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | Fukuoka Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 熱アシスト磁気記録 / 近接場光 / リング共振器 / ナノ光アンテナ |
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| Outline of Final Research Achievements |
In heat-assisted magnetic recording, which is indispensable for increasing the recording density of hard disk drives, a nano-optical head to generate a near-field light as a heat source is necessary, but there is a problem that the light utilization efficiency is low and that the size is large. The objective of this research is to demonstrate a nano-optical head with a novel structure containing a light source, whose light utilization efficiency is significantly high and whose size is significantly small compared with conventional ones. In this research, by conducting a simulation of electromagnetic field analysis for the proposed nano-optical head, various device parameters were optimized and various structures for obtaining high near-field light intensity were proposed and their validity was confirmed. Moreover, by fabricating and testing the proposed nano-optical head, the prospect of significantly improving the efficiency compared with conventional nano-optical heads was confirmed.
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| Free Research Field |
応用光学・量子光工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究はナノフォトニクス・プラズモニクス、マグネティクス、ナノ材料・ナノ加工という複数の分野に跨る独創的なものであり、その学術的な意義は大きい。本研究により、ハードディスク装置の台数を増やすことなく大量のデータの蓄積が可能となり、環境・エネルギー問題の解決および持続可能で豊かな情報文化社会の実現に寄与することができる。また、提案するナノ光ヘッドは光源とナノ光アンテナが一体化していることを特徴とするが、このような光源とナノ光アンテナによる光制御技術は、光を任意の微小領域へ集中させ得ること、超高速な光のスイッチングが可能なことから、高感度バイオセンサー、超高速光論理回路等へも転用可能な技術である。
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