Numerical simulation method for unveiling new waveform-selective metasurfaces

• Project/Area Number: 17KK0114
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Wakatsuchi Hiroki 名古屋工業大学, 工学(系)研究科(研究院), 准教授 (00725278)
• Project Period (FY): 2018 – 2022
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
• Keywords: メタマテリアル / メタサーフェス / パルス / 非線形性 / 電磁界解析 / TLM / 電磁波 / 電波 / 電磁界 / 数値解析 / 電子・電気材料 / 電子デバイス・機器 / 先端的通信 / 先端機能デバイス

Outline of Final Research Achievements

In this research we have developed a new simulation method to visualise how waveform-selective metasurfaces vary electromagnetic field distributions. In this report we introduced an example of a waveform-selective metasurface that changes absorptance in response to the pulse width of the incident wave. As a result of numerical simulations, our study unveiled the intrinsic characteristics of the waveform-selective metasurface, namely, the absorptance varying in accordance with the pulse width. In addition, we showed that the number of circuit ports can be changed by directly introducing SPICE parameters into the simulation method used, specifically, the TLM method.

Academic Significance and Societal Importance of the Research Achievements

今後の展望として、本手法を用いることで得られる電磁界分布に基づいて、波形選択メタサーフェスの振る舞いを詳細に解明し、電磁特性を向上できるようになると期待される。また、本手法とともに波形選択メタサーフェスを用いた応用デバイスの考案なども想定される。例えば、アンテナ設計の一部に取り込んだ場合の放射パターンの観測や、近年活発に研究開発の進められる知的反射面（Intelligent Reflecting Surface）のビームフォーミングの性能評価にも利用できると考えられる。

Research Products

• [Int'l Joint Research] ノッティンガム大学(英国) (2019)
• [Journal Article] Pulse-driven self-reconfigurable meta-antennas (2023)
  • Author(s): Daiju Ushikoshi, Riku Higashiura, Kaito Tachi, Ashif Aminulloh Fathnan, Suhair Mahmood, Hiroki Takeshita, Haruki Homma, Muhammad Rizwan Akram, Stefano Vellucci, Jiyeon Lee, Alessandro Toscano, Filiberto Bilotti, Christos Christopoulos, and Hiroki Wakatsuchi
  • Journal Title: Nature Communications Volume: 14 Issue: 1 Pages: 633-633
  • DOI: 10.1038/s41467-023-36342-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Method for extracting the equivalent admittance from time-varying metasurfaces and its application to self-tuned spatiotemporal wave manipulation (2022)
  • Author(s): Ashif Aminulloh Fathnan, Haruki Homma, Shinya Sugiura, and Hiroki Wakatsuchi
  • Journal Title: Journal of Physics D: Applied Physics Volume: 56 Issue: 1 Pages: 015304-015304
  • DOI: 10.1088/1361-6463/ac9b67
  • Peer Reviewed
• [Journal Article] Anisotropic impedance surfaces activated by incident waveform (2022)
  • Author(s): Homma Haruki、Akram Muhammad Rizwan、Fathnan Ashif Aminulloh、Lee Jiyeon、Christopoulos Christos、Wakatsuchi Hiroki
  • Journal Title: Nanophotonics Volume: - Issue: 9 Pages: 1989-2000
  • DOI: 10.1515/nanoph-2021-0659
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Antenna Applications Based on Waveform-Selective Metasurfaces Varying Time-Domain Responses at the Same Frequency (2019)
  • Author(s): H. Wakatsuchi, D. Ushikoshi, S.M. Mahmood, R. Higashiura, C. Smartt, and C. Christopoulos
  • Organizer: Metamaterials'2019 the 13th International Congress on Artificial Materials for Novel Wave Phenomena
  • Int'l Joint Research