| Issue |
EPL
Volume 153, Number 4, February 2026
|
|
|---|---|---|
| Article Number | 40002 | |
| Number of page(s) | 6 | |
| Section | General physics | |
| DOI | https://doi.org/10.1209/0295-5075/ae4649 | |
| Published online | 24 February 2026 | |
Potential slow surface waves in pentamode materials
1 State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University - Xi'an, 710049, China
2 Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China Shenzhen, 518000, China
Received: 15 November 2025
Accepted: 16 February 2026
Abstract
Slow waves are of significant interest for enhancing imaging resolution, improving detection sensitivity, etc. In this study, we investigate the possibility of slow waves emerging on the surface of solid pentamode materials. Specifically, when a uniform vertical excitation is applied to the bottom surface of a pentamode slab, periodic waveform oscillations appear on the top surface. Further analysis indicates that this surface wave owns a dispersion relation similar to the Rayleigh wave, which has a wavelength about 1/100 of that in common solid material, and can be readily excited via longitudinal and transverse coupling.
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