Designing a phononic crystal with a large defect to enhance elastic wave energy localization and harvesting

Yang, Xiane; Zhong, Jiahui; Xiang, Jiawei

doi:10.35848/1347-4065/ac39f1

Cited by 9 publications

(3 citation statements)

References 40 publications

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“…This property provides a new idea and method for vibration and noise reduction. [10][11][12] Based on the proportionality between the wavelength corresponding to the bandgap frequency and the lattice constant, PnC can be divided into two categories: Bragg scattering PnCs and local resonance PnCs (LRPnCs). Among them, LRPnCs have excellent low frequency bandgap properties due to their ability to control large wavelengths in small sizes.…”

Section: Introductionmentioning

confidence: 99%

Low-frequency broadband vibration reduction based on a square spiral beam local resonance phononic crystal

Chai,

Liu,

Xiang

2024

Jpn. J. Appl. Phys.

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Low-frequency vibration poses a great danger to both industrial production and human health. Therefore, the development of efficient low-frequency vibration reduction structures remains a focus of academic and engineering research. In this paper, a novel low-frequency vibration reduction local resonance phononic crystal (LRPnC) plate with a square spiral beam LRPnC design is proposed. Through finite element simulation, the band structure and vibration characteristics of the LRPnC are first analyzed. On this basis, a gradient LRPnC plate with rainbow trapping effect is constructed by gradient arranging unit cells with different structural parameters to achieve broadband vibration reduction. Finally, the vibration reduction performance of the designed structure is experimentally verified. The finite element analysis results show that the designed gradient LRPnC plate can provide more than 20 dB of transmission attenuation over the full frequency range of 20 to 200 Hz. And the experimental results are consistent with the simulation results.

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Section: Introductionmentioning

confidence: 99%

Low-frequency broadband vibration reduction based on a square spiral beam local resonance phononic crystal

Chai,

Liu,

Xiang

2024

Jpn. J. Appl. Phys.

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“…2) To control acoustic waves, phononic crystals (PnC) in particular have attracted much attention in the past few decades because they can influence the propagation behavior of sound waves by means of flexible design methodologies based on different shapes, dimensions, and materials. PnC has been applied to waveguides, 3) filters, 4) energy harvesters, 5) vibration isolators, 6) and, notably, sensors, [7][8][9][10][11][12][13] showing great potential. Sensors based on PnC show advantages of high sensitivity, quality factor and target selectivity.…”

Section: Introductionmentioning

confidence: 99%

High sensitivity biosensing scheme based on a GHz phononic crystal waveguide

Yuan¹,

Nagakubo²,

Wright³

et al. 2023

Jpn. J. Appl. Phys.

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We propose a high sensitivity biosensor based on a GHz phononic crystal (PnC) waveguide, and demonstrate its operation by numerical simulations. The geometry consists of a micron-scale freestanding PnC silica waveguide plate with embedded Au nanopillars for bioparticle attachment, the PnC plate lying between two groups of periodic metal strips for GHz Lamb-wave acoustic generation and detection with ultrashort light pulses. By precise choice of the waveguide defect width, this biosensor is designed to work using a single, isolated waveguide mode. We study the influence of the waveguide defect width on the acoustic dispersion and transmission of this mode. Bioparticle attachment is simulated by investigation of the Au nanopillar mass loading, and is shown to shift the waveguide transmission peak to lower frequencies. We thereby demonstrate femtogram detection, showing that our approach provides a new methodology for label-free ultra-sensitive biosensing.

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“…These properties allow for the high-density concentration of elastic wave energy inside and near the defect. Inspired by significant energy-localization performance within a narrow frequency range, the potential applications of defect-introduced PnCs have been suggested as narrow bandpass filters [13,14], resonance-type energy harvesters [15,16], sensors [17,18], and actuators [19,20].…”

Section: Introductionmentioning

confidence: 99%

Impact of Input Signal Characteristics on Energy-Localization Performance of a Phononic Crystal with a Defect: A Comparative Study of Burst and Continuous Wave Excitation

2023

Crystals

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This study examines the energy-localization performance of a one-dimensional phononic crystal (PnC) with a defect when exposed to burst waves of different cycle numbers under longitudinal waves. Using the finite element method, band structures of the defect-introduced PnC were calculated, revealing a phononic band-gap range, defect-band frequencies, and corresponding defect-mode shapes. The transient analysis examined the longitudinal displacement at the center of this defect in the time domain for various burst-wave scenarios. The results indicate that energy-localization performance inside the defect highly depended on the number of cycles. Energy-localization performance was better with larger cycles or continuous waves, although burst waves with a small number of cycles also showed some improvement, albeit limited. Moreover, burst waves with a small number of cycles did not clearly induce fixed-like boundary conditions (in other words, nodal points in standing waves) within the defect-introduced PnC, leading to obscure energy-localized behaviors. Key messages from this work can be summarized as follows. First, comparing the energy-localization performance under incident burst waves with different cycle numbers for different systems might not be appropriate. Second, the physically reasonable formation of defect-mode-enabled energy localization requires burst waves with a large (in the case study, over 500) number of cycles.

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Designing a phononic crystal with a large defect to enhance elastic wave energy localization and harvesting

Cited by 9 publications

References 40 publications

Low-frequency broadband vibration reduction based on a square spiral beam local resonance phononic crystal

Low-frequency broadband vibration reduction based on a square spiral beam local resonance phononic crystal

High sensitivity biosensing scheme based on a GHz phononic crystal waveguide

Impact of Input Signal Characteristics on Energy-Localization Performance of a Phononic Crystal with a Defect: A Comparative Study of Burst and Continuous Wave Excitation

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