Broadband Reflective Elastic Mode Conversion Enabled by a Single Row of Inclined Long-Slits
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911284548599808 |
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| author | Feng, Kaifei Wang, Weidong Gao, Yucheng Liu, Fengming Du, Qiujiao Zhang, Wenshuai Peng, Pai |
| author_facet | Feng, Kaifei Wang, Weidong Gao, Yucheng Liu, Fengming Du, Qiujiao Zhang, Wenshuai Peng, Pai |
| contents | Broadband longitudinal-to-transverse mode conversion under normal incidence remains difficult to achieve, especially with structurally simple designs. Numerical simulations show that a single periodic row of inclined long-slits near a free surface enables high-efficiency broadband conversion, where the conversion rate exceeds 0.8 across a normalized-frequency range of 0.27 to 0.74, corresponding to a 93.1% relative bandwidth. The broadband response originates from two intrinsic deformation modes of the mass blocks between adjacent inclined slits: a rotational mode and a quadrupole mode. The spectral overlap of these two modes sustains a continuous high-efficiency band. The effect is robust against geometric variations, demonstrating that geometric asymmetry alone offers a minimal yet effective route to broadband elastic-wave mode conversion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_19839 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broadband Reflective Elastic Mode Conversion Enabled by a Single Row of Inclined Long-Slits Feng, Kaifei Wang, Weidong Gao, Yucheng Liu, Fengming Du, Qiujiao Zhang, Wenshuai Peng, Pai Applied Physics Broadband longitudinal-to-transverse mode conversion under normal incidence remains difficult to achieve, especially with structurally simple designs. Numerical simulations show that a single periodic row of inclined long-slits near a free surface enables high-efficiency broadband conversion, where the conversion rate exceeds 0.8 across a normalized-frequency range of 0.27 to 0.74, corresponding to a 93.1% relative bandwidth. The broadband response originates from two intrinsic deformation modes of the mass blocks between adjacent inclined slits: a rotational mode and a quadrupole mode. The spectral overlap of these two modes sustains a continuous high-efficiency band. The effect is robust against geometric variations, demonstrating that geometric asymmetry alone offers a minimal yet effective route to broadband elastic-wave mode conversion. |
| title | Broadband Reflective Elastic Mode Conversion Enabled by a Single Row of Inclined Long-Slits |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2511.19839 |