2021 Fiscal Year Annual Research Report
Development and quantitative interpretation of acoustic and phoxonic metamaterial devices from kHz to GHz frequencies
| Project/Area Number |
19H05619
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| Research Institution | Hokkaido University |
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Principal Investigator |
O・B Wright 北海道大学, 工学研究院, 教授 (90281790)
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| Co-Investigator(Kenkyū-buntansha) |
松田 理 北海道大学, 工学研究院, 准教授 (30239024)
友田 基信 北海道大学, 工学研究院, 助教 (30344485)
野村 政宏 東京大学, 先端科学技術研究センター, 准教授 (10466857)
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| Project Period (FY) |
2019-06-26 – 2022-03-31
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| Keywords | sound / metamaterials / phonon / electromagnetic waves / plasmon / metasurface |
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| Outline of Annual Research Achievements |
1. Metamaterial-based acoustic microscopy: With our scanning extraordinary-transmission-based acoustic microscope for deep subwavelength imaging, we have developed an analytical theory of the system based on the sonic Drexhage effect and a journal paper is in preparation.
2. Metasurface for air-water acoustic transmission: We have experimented on a new floating metasurface system of masses and springs of area 50 cm x 50 cm in a swimming pool to achieve enhanced acoustic transmission from water to air, with an enhancement achieved equal to ~150 in intensity. This structure is close to practical application for a diver warning system. A journal paper is in preparation.
3. Metapillars and metaplates for broadband multimode vibration isolation: A tapered metarod for broadband operation was tested and simulated, based on our previous straight metarod design, and sound blocking in the range 0.5-1 kHz demonstrated for all modes. A paper is being prepared for publication in Applied Physics Letters.
4. Flexural metaplates: We are continued to write up our results as a journal paper.
5. Phoxonic metamaterials for new physics and applications: We have demonstrated a triple negative phoxonic metamaterial based on a microwave double-negative metamaterial combined with a kHz acoustic negative-density metamaterial. A conference paper has been submitted on this subject. We hope also to finish simulations and submit a journal paper in the near future.
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| Research Progress Status |
令和3年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和3年度が最終年度であるため、記入しない。
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Research Products
(18 results)
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[Presentation] Giant extraordinary transmission of longitudinal acoustic waves2021
Author(s)
Oliver B. Wright, Thibaut Devaux, Hiroya Tozawa, Paul H. Otsuka, Sylvain Mezil, Motonobu Tomoda, Osamu Matsuda, Eun Bok, Sam Hyeon Lee
Organizer
META 2021, the 11th International Conference on Metamaterials, Photonic Crystals and Plasmonics, 20-23 July, University of Warsaw, Poland
Int'l Joint Research / Invited
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