Effect of defect configuration on the localization of phonons in two-dimensional phononic crystals

He, Yuan; Wu, Fugen; Yao, Yuanwei; Zhang, Xin; Mu, Zhongfei; Yan, Shuya; Cheng, Cong

doi:10.1016/j.physleta.2013.02.001

Cited by 29 publications

(13 citation statements)

References 25 publications

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“…[11] Theoretical and experimental studies indicate that the wave localization can be significantly affected by a size of the PnC supercell, location and shape of the defect cell, and material composition. [12,13] To this end, some design strategies were proposed to explore new defect cell configurations (such as coupled sonic crystal resonators) [14] to achieve better localization efficiency. However, all current methods of PnC resonant cavity design rely on heuristic strategies and cannot guarantee that resonant cavities for the specified frequencies will be obtained.…”

Section: Introductionmentioning

confidence: 99%

A Precisely‐Controlled Multichannel Phononic Crystal Resonant Cavity

Zhang

Jia

Luo

et al. 2021

Advcd Theory and Sims

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Designing multichannel phononic crystal (PnC) resonant cavities working at certain frequencies is highly nontrivial because the defect band location within the band gap must be precisely located. This paper discloses a new methodology of the topological design for the precisely-controlled PnC resonant cavity. A two-stage topological design strategy is proposed to determine the frequency ranges of the forbidden and defect bands successively. Complicated topologies of the supercell are represented only with dozens of design variables based on material-field series expansion model and can be optimized with a gradient-free optimization algorithm. Different PnC resonant cavity configurations that are difficult to obtain through traditional design methods are realized through the proposed strategy. A multichannel energy harvester is thus designed with the optimized supercell configurations. The device demonstrates a high localization effect (>300%), high frequency resolution of the incident wave (≈0.2 kHz), and a 2 mW power output.

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Section: Introductionmentioning

confidence: 99%

A Precisely‐Controlled Multichannel Phononic Crystal Resonant Cavity

Zhang

Jia

Luo

et al. 2021

Advcd Theory and Sims

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“…The geometric and physical properties of these crystals, such as the periodicities, the shape of the inclusions and the nature of the material, were chosen in several studies to have wide bands gap used in guiding (Wang et al, 2013), (Mohammadi et al, 2008), filtering and confining elastic waves to localize phononic modes in defects (cavities (Zhang et al, 2012), (He et al, 2013), for the purpose of manipulating the resonance frequencies of phononic modes that may participate in an interaction with an electromagnetic mode (Akimov et al, 2008), (Eichenfield et al, 2009b), (Sadat-Saleh et al, 2009), (Eichenfield et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

Cavity modes Investigation in phononic crystal

2019

Aust. J. Basic & Appl. Sci

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“…Phononic crystals (PCs) are functional periodic structures which consist of materials with different elastic properties. They have attracted considerable research since they exhibit multi-physical phenomena, such as the negative refraction [1][2], localized defect modes [3][4], complete frequency gaps [5][6][7][8][9][10]. Elastic waves of any modes within the complete frequency gaps are forbidden to propagate along any direction.…”

Section: Introductionmentioning

confidence: 99%

Tunable Lamb wave band gaps in two-dimensional magnetoelastic phononic crystal slabs by an applied external magnetostatic field

2016

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This paper theoretically investigates the band gaps of Lamb mode waves in two-dimensional magnetoelastic phononic crystal slabs by an applied external magnetostatic field. With the assumption of uniformly oriented magnetization, an equivalent piezomagnetic material model is used. The effects of magnetostatic field on phononic crystals are considered carefully in this model. The numerical results indicate that the width of the first band gap is significantly changed by applying the external magnetic field with different amplitude, and the ratio between the maximum and minimum gap widths reaches 228%. Further calculations demonstrate that the orientation of the magnetic field obviously affects the width and location of the first band gap. The contactless tunability of the proposed phononic crystal slabs shows many potential applications of vibration isolation in engineering.

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Effect of defect configuration on the localization of phonons in two-dimensional phononic crystals

Cited by 29 publications

References 25 publications

A Precisely‐Controlled Multichannel Phononic Crystal Resonant Cavity

A Precisely‐Controlled Multichannel Phononic Crystal Resonant Cavity

Cavity modes Investigation in phononic crystal

Tunable Lamb wave band gaps in two-dimensional magnetoelastic phononic crystal slabs by an applied external magnetostatic field

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