The role of disorder in phononic structures is a fundamental question with implications for the design of future phononic nanodevices. Phononic crystals, composed of ordered and periodic arrays of engineered scatterers, have proven effective for nanoscale acoustic wave control [1]. However, these systems are typically designed to operate within a narrow frequency window, and fabrication imperfections can further degrade their performance. An open question in these systems is to what extent their order can be perturbed while preserving their mechanical properties [2]. This is both a fundamental question and one with practical implications, as disordered structures can exhibit greater robustness to imperfections and fabrication errors.
In this context, hyperuniformity emerges as a distinctive regime that bridges order and disorder, combining characteristics of both random and periodic structures [3].
Here, we report the experimental realization of a hyperuniform phononic structure consisting of gold nanopillars on a piezoelectric lithium niobate layer, enabling the control over the propagation of surface acoustic waves. The structure induces broadband acoustic attenuation, including bandgap-like regions of strong wave suppression. Furthermore, by selectively removing pillars, we design waveguides that support high-transmission modes within these effective bandgaps.
This work provides a framework for designing advanced phononic nanodevices based on hyperuniform patterns, offering new functionalities and design flexibility.

References
1) M. Diego, M. Pirro, B. Kim, R. Anufriev, and M. Nomura, ACS nano 18, 18307 (2024)
2) M. R. Wagner, B. Graczykowski, J. S. Reparaz, A. El Sachat, M. Sledzinska, F. Alzina, and C. M. Sotomayor Torres, Nano letters 16, 5661 (2016)
3) S. Torquato and F.H. Stillinger, Physical Review E 68.4:041113 (2003)