An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes
Abstract Second‐order elastic topological insulators (SETIs) with tightly localized corner states present a promising avenue for manipulating elastic waves in lower dimensions. However, existing SETIs typically support corner states of only a single mode, either out‐of‐plane or in‐plane. In this wor...
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202411398 |
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| author | Yafeng Chen Lei Fan Jie Zhu Zhongqing Su |
| author_facet | Yafeng Chen Lei Fan Jie Zhu Zhongqing Su |
| author_sort | Yafeng Chen |
| collection | DOAJ |
| description | Abstract Second‐order elastic topological insulators (SETIs) with tightly localized corner states present a promising avenue for manipulating elastic waves in lower dimensions. However, existing SETIs typically support corner states of only a single mode, either out‐of‐plane or in‐plane. In this work, an on‐chip SETI that simultaneously hosts both high‐frequency out‐of‐plane and in‐plane corner states at ≈0.2 MHz is introduced. The presence of these corner states is experimentally validated, and their selective excitation by tuning the excitation frequency is demonstrated. This capability to demultiplex out‐of‐plane and in‐plane corner states positions the SETI as a potential platform for developing multifunctional elastic devices and enhancing the communication capacities of elastic waves. Furthermore, due to its structural simplicity, the SETI can be readily scaled and integrated into on‐chip elastic circuits, making it suitable for applications in micro‐electromechanical systems. |
| format | Article |
| id | doaj-art-7ff98587b94f4057856e51d9594f4cc7 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj-art-7ff98587b94f4057856e51d9594f4cc72025-01-29T09:50:19ZengWileyAdvanced Science2198-38442025-01-01124n/an/a10.1002/advs.202411398An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner ModesYafeng Chen0Lei Fan1Jie Zhu2Zhongqing Su3Department of Mechanical Engineering The Hong Kong Polytechnic University Kowloon Hong Kong SAR 999077 ChinaDepartment of Mechanical Engineering The Hong Kong Polytechnic University Kowloon Hong Kong SAR 999077 ChinaInstitute of Acoustics School of Physics Science and Engineering Tongji University Shanghai 200092 ChinaDepartment of Mechanical Engineering The Hong Kong Polytechnic University Kowloon Hong Kong SAR 999077 ChinaAbstract Second‐order elastic topological insulators (SETIs) with tightly localized corner states present a promising avenue for manipulating elastic waves in lower dimensions. However, existing SETIs typically support corner states of only a single mode, either out‐of‐plane or in‐plane. In this work, an on‐chip SETI that simultaneously hosts both high‐frequency out‐of‐plane and in‐plane corner states at ≈0.2 MHz is introduced. The presence of these corner states is experimentally validated, and their selective excitation by tuning the excitation frequency is demonstrated. This capability to demultiplex out‐of‐plane and in‐plane corner states positions the SETI as a potential platform for developing multifunctional elastic devices and enhancing the communication capacities of elastic waves. Furthermore, due to its structural simplicity, the SETI can be readily scaled and integrated into on‐chip elastic circuits, making it suitable for applications in micro‐electromechanical systems.https://doi.org/10.1002/advs.202411398elastic metamaterialselastic topological insulatorelastic wavesmicro elastic devices |
| spellingShingle | Yafeng Chen Lei Fan Jie Zhu Zhongqing Su An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes Advanced Science elastic metamaterials elastic topological insulator elastic waves micro elastic devices |
| title | An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes |
| title_full | An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes |
| title_fullStr | An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes |
| title_full_unstemmed | An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes |
| title_short | An On‐Chip Second‐Order Elastic Topological Insulator for Demultiplexing Out‐of‐Plane and In‐Plane Corner Modes |
| title_sort | on chip second order elastic topological insulator for demultiplexing out of plane and in plane corner modes |
| topic | elastic metamaterials elastic topological insulator elastic waves micro elastic devices |
| url | https://doi.org/10.1002/advs.202411398 |
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