Refraction, beam splitting and dispersion of GHz surface acoustic waves by a phononic crystal [PDF]
Photoacoustics, 2023 We exploit a time-resolved ultrafast optical technique to study the propagation of point-excited surface acoustic waves on a microscopic two-dimensional phononic crystal in the form of a square lattice of holes in a silicon substrate.
Osamu Matsuda +5 more
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Research on Fabrication of Phononic Crystal Soft-Supported Graphene Resonator [PDF]
NanomaterialsIn aviation, aerospace, and other fields, nanomechanical resonators could offer excellent sensing performance. Among these, graphene resonators, as a new sensitive unit, are expected to offer very high mass and force sensitivity due to their extremely ...
Xiande Zheng +4 more
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Defect-Free Phononic Crystal Waveguides on GaAs
Crystals, 2023 A phononic crystal waveguide is presented that consists of the inverse of a typical structure. Instead of a defect waveguide within an extended phononic crystal, this waveguide consists of a phononic crystal of finite width, and the phononic crystal ...
Edward Muzar, James A. H. Stotz
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Imaging phonon eigenstates and elucidating the energy storage characteristics of a honeycomb-lattice phononic crystal cavity [PDF]
Photoacoustics, 2023 We extend gigahertz time-domain imaging to a wideband investigation of the eigenstates of a phononic crystal cavity. Using omnidirectionally excited phonon wave vectors, we implement an ultrafast technique to experimentally probe the two-dimensional ...
P.H. Otsuka +10 more
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Acoustic energy harvesting using phononic crystal fiber with conical input [PDF]
Scientific ReportsIn this paper, a novel phononic crystal fiber with conical input is introduced for coupling environmental acoustic waves to the fiber core. Environmental acoustic waves can be focused and coupled to the core through conical input.
Farzaneh Motaei, Ali Bahrami
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Two-Dimensional Phononic Crystal Based Sensor for Characterization of Mixtures and Heterogeneous Liquids [PDF]
Sensors, 2022 We show new approaches to developing acoustic liquid sensors based on phononic crystals. The proposed phononic crystal integrates fluidic elements. A solid block with periodic cylindrical holes contains a defect—a liquid-filled cylindrical cavity. We pay
Nikolay Mukhin +4 more
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Design of phononic crystal for enhancing low-frequency sound absorption in mufflers [PDF]
Scientific ReportsTo enhance the low-frequency sound absorption capabilities of expansion chamber mufflers, a novel Helmholtz-ring phononic crystal cell was developed. This innovative design integrates ring Helmholtz resonators as the phononic crystal scatterer, which is ...
Yang Bai, Yuehua Chen, Jiahui Zheng
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Reem-Shape Phononic Crystal for Q Anchor Enhancement of Thin-Film-Piezoelectric-on-Si MEMS Resonator [PDF]
Micromachines, 2023 This paper proposes a reem-shaped phononic crystal for the performance enhancement of TPoS resonators. The proposed phononic crystal offers an ultra-wide acoustic band gap that prevents energy leakage through the supporting substrate upon its placement ...
Mohammed Awad +3 more
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Quality Factor Improvement of a Thin-Film Piezoelectric-on-Silicon Resonator Using a Radial Alternating Material Phononic Crystal [PDF]
Micromachines, 2023 This paper studies the radial alternating material phononic crystal (RAM-PnC). By simulating the band gap structure of the phononic crystal, a complete acoustic band gap was verified at the resonant frequency of 175.14 MHz, which can prevent the ...
Chuang Zhu +5 more
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Journal of Low Frequency Noise, Vibration and Active Control, 2023 Vibration and noise pollution is one of the main pollution in modern society. In order to obtain good vibration damping effect, more effective phononic crystals should be designed. Based on the theory of elastic wave propagation in solids, three types of
Rongjiang Tang +3 more
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