Details
| Original language | English |
|---|---|
| Article number | 011121 |
| Number of pages | 11 |
| Journal | APL materials |
| Volume | 12 |
| Issue number | 1 |
| Publication status | Published - 23 Jan 2024 |
Abstract
Topological states have been receiving a great deal of interest in various wave problems, such as photonic, acoustic, and elastic waves. However, few studies of topological elastic waves in non-periodic systems have been reported. Recently, hyperuniform systems suppressing long-range order while partly maintaining short-range order have provided new opportunities to control waves. In this work, we study the elastic topological interface states appearing between two Su-Schrieffer-Heeger (SSH)-like pillared metabeams where each metabeam, is constituted by a mirror symmetric hyperuniform structure. The SSH-like model is constructed by combining two hyperuniform metabeams with inverted configurations. We demonstrate that this structure could open new bandgaps at low frequencies, of which some are nontrivial and can support topological interface modes. We further show that the number of low-frequency bandgaps supporting the topological modes increases with the level of randomness, hence providing a high number of interface modes in the same structure. The robustness of the topological interface states against random perturbations in the pillars’ positions is further verified. Our work offers a reliable platform for studying topological properties and hyperuniform metamaterials and designing wave control devices for low-frequency wave attenuation and robust energy localization.
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In: APL materials, Vol. 12, No. 1, 011121, 23.01.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Topological elastic interface states in hyperuniform pillared metabeams
AU - Cai, Runcheng
AU - Pennec, Yan
AU - Carpentier, Laurent
AU - Jin, Yabin
AU - Rabczuk, Timon
AU - Zhuang, Xiaoying
AU - Djafari-Rouhani, Bahram
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos.12272267 and 52278411), the Young Elite Scientists Sponsorship Program by CAST (Grant No. 2021QNRC001), the Shanghai Science and Technology Commission (Grant Nos. 22JC1404100 and 21JC1405600), the Special Funds of the Tongji University for “Sino-German Cooperation 2.0 Strategy,” and the Fundamental Research Funds for the Central Universities. The first author is grateful for the support of the China Scholarship Council (Grant No. 202206260205). This work was part of the project MAGNIFIC, which has received funding from the European Union’s Horizon Europe research and innovation program under Grant Agreement No. 101091968. The project is also supported by the French national research agency ANR under Grant Agreement No. ANR-19-CE24-0014.
PY - 2024/1/23
Y1 - 2024/1/23
N2 - Topological states have been receiving a great deal of interest in various wave problems, such as photonic, acoustic, and elastic waves. However, few studies of topological elastic waves in non-periodic systems have been reported. Recently, hyperuniform systems suppressing long-range order while partly maintaining short-range order have provided new opportunities to control waves. In this work, we study the elastic topological interface states appearing between two Su-Schrieffer-Heeger (SSH)-like pillared metabeams where each metabeam, is constituted by a mirror symmetric hyperuniform structure. The SSH-like model is constructed by combining two hyperuniform metabeams with inverted configurations. We demonstrate that this structure could open new bandgaps at low frequencies, of which some are nontrivial and can support topological interface modes. We further show that the number of low-frequency bandgaps supporting the topological modes increases with the level of randomness, hence providing a high number of interface modes in the same structure. The robustness of the topological interface states against random perturbations in the pillars’ positions is further verified. Our work offers a reliable platform for studying topological properties and hyperuniform metamaterials and designing wave control devices for low-frequency wave attenuation and robust energy localization.
AB - Topological states have been receiving a great deal of interest in various wave problems, such as photonic, acoustic, and elastic waves. However, few studies of topological elastic waves in non-periodic systems have been reported. Recently, hyperuniform systems suppressing long-range order while partly maintaining short-range order have provided new opportunities to control waves. In this work, we study the elastic topological interface states appearing between two Su-Schrieffer-Heeger (SSH)-like pillared metabeams where each metabeam, is constituted by a mirror symmetric hyperuniform structure. The SSH-like model is constructed by combining two hyperuniform metabeams with inverted configurations. We demonstrate that this structure could open new bandgaps at low frequencies, of which some are nontrivial and can support topological interface modes. We further show that the number of low-frequency bandgaps supporting the topological modes increases with the level of randomness, hence providing a high number of interface modes in the same structure. The robustness of the topological interface states against random perturbations in the pillars’ positions is further verified. Our work offers a reliable platform for studying topological properties and hyperuniform metamaterials and designing wave control devices for low-frequency wave attenuation and robust energy localization.
UR - http://www.scopus.com/inward/record.url?scp=85183030436&partnerID=8YFLogxK
U2 - 10.1063/5.0184699
DO - 10.1063/5.0184699
M3 - Article
AN - SCOPUS:85183030436
VL - 12
JO - APL materials
JF - APL materials
SN - 2166-532X
IS - 1
M1 - 011121
ER -