Visualization and optical control of electromagnetic resonances in mesostructures

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K21179
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
• Research Institution: Waseda University
• Principal Investigator: Imura Kohei 早稲田大学, 理工学術院, 教授 (80342632)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Keywords: メソ物質 / 電気双極子遷移 / 磁気双極子遷移 / 近接場光学顕微鏡 / 光学特性制御

Outline of Final Research Achievements

In the subwavelength scale meso-materials, electromagnetic fields are significantly amplified by elementally excitations, and consequently novel optical properties can be realized. However, for that purpose, deep understanding of the electromagnetic fields induced in the meso-material is indispensable. In this study, we performed ultra-precise nano-imaging of the meso-materials and clarified spatial characteristics of the electromagnetic fields in the materials. In addition, we achieved giant optical response of the meso-material by using new light-matter interaction. The developed methods are promising for creating new functions in the meso-materials.

Free Research Field

物理化学

Academic Significance and Societal Importance of the Research Achievements

本研究では，物質の光学特性の新評価法を導入するとともに，従来にない方法で物質の光応答を増強する方法を開発した。これらの成果は，今後，物質の新機能創出につながるとともに，新しい研究の源流となることが期待される学術的な意義がある。また，光応答の増強法は，光エネルギーの効率的利用をはじめ，光センサや発光デバイスなどの開発につながることが期待されることから，社会的な意義がある。