2023 Fiscal Year Final Research Report

Control of terahertz wave transmission by electromagnetic coupling of dissimilar dielectric layers and its application to sheet LAN communications

Research Project

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Project/Area Number	21H01328
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 21020:Communication and network engineering-related
Research Institution	Chiba Institute of Technology
Principal Investigator	Akihiko Hirata 千葉工業大学, 工学部, 教授 (40500674)
Co-Investigator(Kenkyū-buntansha)	廣川二郎東京工業大学, 工学院, 教授 (00228826) 永妻忠夫大阪大学, 大学院基礎工学研究科, 教授 (00452417)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	近接無線 / テラヘルツ / メタマテリアル
Outline of Final Research Achievements	We have developed a technology that enables control of terahertz wave transmission by proximity of different functional dielectric layers, and have realized terahertz band ultrahigh-speed LAN sheet communications using this transmission control. By replacing part of the metallic surface at the top of the hollow waveguide with a metamaterial-integrated glass substrate, we have achieved transmission with low loss in the waveguide alone and demonstrated that 10 Gbps transmission by contact communication is possible when the glass substrate is in contact with a different dielectric layer. The mechanisms of magnetic and electrical coupling between adjacent SRRs of different sizes were elucidated by evaluating the transmission characteristics of samples with multiple split ring resonators (SRRs) of different sizes mounted on a quartz substrate and by conducting electromagnetic field analysis.
Free Research Field	無線通信
Academic Significance and Societal Importance of the Research Achievements	異なる機能性誘電体層を近接した際の電磁カップリング現象を解明し、この電磁カップリングに関するモデル構築や設計論の確立ができれば、通信状況に応じて通過帯域を可変可能な適応フィルタや複数の異なる機能性誘電体層を積層した高屈折率レンズ・高Q値フィルタ・広帯域電波吸収体などの新学問分野を創造することができる。また、それらの成果は、LANシートの実現だけではなく、超高速データ転送用キオスク端末や、対となる機能性誘電体層を集積した受信アンテナを「物理的鍵」として、決められたペアーとなる端末のみ接触通信を可能にするセキュリティ応用などの新たな応用を創造することが期待される。