2022 Fiscal Year Final Research Report
Plasmonic photo-thermoelectric conversion
| Project/Area Number |
20K05261
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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 28030:Nanomaterials-related
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Kubo Wakana 東京農工大学, 工学(系)研究科(研究院), 教授 (10455339)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | プラズモニック光熱電変換 / メタマテリアル / 熱電変換 |
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| Outline of Final Research Achievements |
This study aims to elucidate the driving mechanism of plasmonic photo-thermoelectric conversion, which is a completely new phenomenon of converting light energy into electricity through heat, discovered by the applicant. It also aims to realize high-efficient photoelectric conversion devices based on this mechanism.
By utilizing a metamaterial perfect absorber with anisotropic geometry, we evaluated the correlation between the optical and photelectric conversion characteristics of the plasmonic photo-thermoelectric conversion device under polarized illumination. The results confirmed that the plasmonic photo-thermoelectric conversion mechanism occurs through the generation of plasmon resonance in metal nanostructures under light illumination, inducing a temperature gradient across the thermoelectric conversion film, leading to thermoelectric conversion.
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| Free Research Field |
光機能性材料・デバイスの開発
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| Academic Significance and Societal Importance of the Research Achievements |
プラズモニック光熱電変換は新しい光電変換機構の一つであり，その駆動機構の解明は学術的に重要な意味を持つ．加えて，本機構は光検出器への展開が期待される．特に，プラズモニック構造はサブミクロンサイズの構造を有するため，従来の撮像素子で検出できるよりもより小さなナノ空間領域の微小な光を検出でき，ナノサイエンスにおける物性解明やナノピクセル撮像素子に展開できると考えられる．本研究を通してプラズモニック光熱電変換機構の駆動原理を解明したことから，今後さらなる光電変換効率の向上に向け，駆動原理に基づき設計指針を立てることが可能となった．将来的にイメージング技術などへの発展に寄与することが期待できる．
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