2023 Fiscal Year Final Research Report
Establishment of the design theory of invisivle cloaks for hiding larger objects than the wavelength and the realization
| Project/Area Number |
22K14608
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 29030:Applied condensed matter physics-related
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Keywords | 透明マント / カーペットクローク / 電磁メタマテリアル / 回路モデル |
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| Outline of Final Research Achievements |
In this research, the metamaterial design theory for invisible cloaks hiding a larger object than the wavelength has been established. A one-dimensional meander transmission-line model has been used for the design, and the theoretical formula for determining the line length has been derived. Based on the proposed theory, a transmission-type invisible cloak and a reflection one (carpet cloak) have been designed by using a one-dimensional meander microstrip-line structure, and it has been demonstrated by calculating complex electric field distributions with full-wave simulations that those can hide a much larger object than the wavelength. Also, the designed carpet cloak has been implemented on a dielectric substrate and the operation has been verified by near-field measurements with a network analyzer and an electric probe. The mesurement results have shown that the fabricated carpet cloak can hide a much larger object than the wavelength.
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| Free Research Field |
マイクロ波工学, 電磁メタマテリアル
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果により, 波長よりも大きな物体を隠すことができ, かつ非常に広帯域な特性を持つ透明マントを, 回路モデルを用いて理論的に設計することが可能になった. 本研究では, 電磁透明マントの設計・試作・実証実験を行なったが, 将来的に理論を拡張して光の領域まで動作帯域を引き上げれることができれば, 全ての光に対して動作可能な透明マントの実現に繋がる可能性がある. また, 研究代表者の従来の研究から, 回路モデルを用いた設計法は光・電磁波に限らず, 音波など異分野の波に対しても適用可能であることが分かっており, 例えば音波に対して波長よりも大きな物体を隠せる音響透明マントへの展開も期待できる.
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