2022 Fiscal Year Final Research Report
Development of transmission electron microscopy to visualize optical field
Project/Area Number |
19K22136
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 29:Applied condensed matter physics and related fields
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Research Institution | Japan Fine Ceramics Center |
Principal Investigator |
Yamamoto Kazuo 一般財団法人ファインセラミックスセンター, その他部局等, 主席研究員 (80466292)
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Co-Investigator(Kenkyū-buntansha) |
穴田 智史 一般財団法人ファインセラミックスセンター, その他部局等, 上級研究員 (40772380)
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Project Period (FY) |
2019-06-28 – 2023-03-31
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Keywords | 電子線ホログラフィー / レーザー / 光干渉 / 電場 / 半導体 |
Outline of Final Research Achievements |
The purpose of this study is to develop a basic technique to observe the electric field of light and the interaction between light and materials using phase-shifting electron holography. A 300-kV transmission electron microscope (TEM) was used to introduce the light. Using a xenon lamp and a special light-introducing sample holder, we successfully observed changes in the electric potential distribution of ZnO nanowires and GaAs p-n junctions by electron holography while irradiating the samples with light. In order to observe the electric field of light, a special light interference sample holder was designed and fabricated to generate light interference in the TEM observation area. Although it was difficult to confirm the interference due to the weak output of the laser, we were able to extract the necessary issues for the future.
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Free Research Field |
電子顕微鏡計測
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Academic Significance and Societal Importance of the Research Achievements |
光は電場と磁場が直交する電磁波である.光の電場や磁場が,物質とどのように相互作用するかは不明な点が多く,その様子を直接的に実験で観察できる手法が確立すれば,光による反応現象を明らかにできる.本研究では,光照射電子線ホログラフィー技術を確立することによって,半導体による光起電力効果を可視化することに成功した.カーボンニュートラルの実現に必要な太陽電池などの高性能化に,この技術が寄与できると考えられる.また,光干渉現象の可視化を行うための技術開発も行った.多くの課題はあるものの今後の光を用いた物理の解明にも繋がると考えられる.
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