Cyclically symmetric radially self-similar phononic pseudocrystal isolator for broadband, ultrasonic vibration bandstop filtering

Journal Article · Sun Feb 23 23:00:00 EST 2025 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0246151· OSTI ID:2585671

Swift, Stephen Hales ^[1]; El-Kady, Ihab Fathy ^[1]; Kellogg, Rick A. ^[1]; Cillessen, Dale E. ^[1]; Denison, Michael H. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

A 2D phononic pseudocrystal isolator exhibiting cyclic symmetry and radial self-similarity is measured and demonstrated to block a wide range of ultrasonic vibration. Measurements of longitudinal and shear wave blocking effects are made and compared with computational results. The use of the bandgap edge ratio is recommended for quantifying suppression in very-wide-bandgap materials. In conclusion, the upper-to-lower suppression edge frequency ratios of 3–4 are remarkably large for shear waves and even larger for longitudinal waves upper-to-lower suppression ratio (13 at 5 dB), such that 92.5% of frequencies in that range experience ≥ 5 dB of suppression.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: NA0003525
• OSTI ID: 2585671
• Report Number(s): SAND--2025-07469J; 1761991
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 8 Vol. 126; ISSN 1077-3118; ISSN 0003-6951
• Publisher: AIP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

Acoustic metamaterial
Elastic waves
Materials properties
Phononic crystal
Shear waves
Signal processing
Ultrasonic vibrations
Vibration isolators
Wave mechanics