Verification of enlarged concept of metamaterials by plasma composites

2021 Fiscal Year Final Research Report

• Project/Area Number: 18H03690
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 14:Plasma science and related fields
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: Sakai Osamu 滋賀県立大学, 工学部, 教授 (30362445)
• Co-Investigator(Kenkyū-buntansha): 新戸 浩幸 福岡大学, 工学部, 教授 (80324656) ; 玉山 泰宏 長岡技術科学大学, 工学研究科, 准教授 (50707312)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Keywords: プラズマ / メタマテリアル / マイクロ波 / 赤外材料・素子 / 微粒子

Outline of Final Research Achievements

The purpose of this study on plasma-metamaterial composites is verification of novel physical mechanisms arising from their high-energy states, based on their multi-scale properties and super wide-band frequency dispersions. They possess internal high-energy density by several orders of magnitude, in comparison with that of conventional metamaterials, leading to abnormal phenomena related to energy equilibrium, energy conversion and nonlinearity. Thus, from both physical and technological points of views, we performed this study both theoretically and experimentally.

Free Research Field

プラズマ理工学

Academic Significance and Societal Importance of the Research Achievements

メタマテリアルという、これまでにないパラメータを実現できる媒質・物質をプラズマの中に導入することで、負屈折率状態のみならず、電磁波のクローキング（隠れ蓑）現象・吸収現象・集光現象・散乱現象を制御性良く実現するとともに、その非線形性の検討およびそのパラメータ領域の拡大にも貢献できた。さらに、プラズマ・メタマテリアルの考え方をマイクロ波帯電磁波のみならず、光波領域へ拡大するための基礎知見の充実にも努めた。