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Crystals
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Advances and Application of Phononic Crystals
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Advances and Application of Phononic Crystals

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 2705

Special Issue Editors

Dr. Yu Cang

E-Mail Website
Guest Editor
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
Interests: brillouin light scattering; phononic crystals; thermal dynamics
Prof. Dr. Bin Yang

E-Mail Website
Guest Editor
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
Interests: composite materials; mechanical behavior of materials
Special Issues, Collections and Topics in MDPI journals
Dr. Fangxin Wang

E-Mail Website
Guest Editor
College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
Interests: biomimetic surfaces; composite materials

Special Issue Information

Dear Colleagues,

Phononic crystals (PnCs) with artificially designed periodic microstructures have proved to be of great interest over the past two decades due to their unique properties, which cannot be easily realized in natural materials. Several important features, including negative refraction and bandgap structure, have triggered fundamental and practical studies in many fields, showing great potential for acoustic and thermal applications in everyday life. The deep wavelength nature inherent to phononic crystals spans a wide frequency range, stimulating investigations on their bandgap, negative bulk modulus, and so on. Recently, PnCs have attracted significant attention in energy-harvesting applications. These sophisticatedly designed architectures enable functions such as suppressing undesired noise and vibration, directing wave propagations, and converting acoustic/elastic energy into other forms, some of which have been used in micro-electromechanical systems. Advances in PnCs have aroused significant interest from researchers in multiple disciplines in exploring novel functionalities and extending their applications. This Special Issue aims to highlight PnC-related applications and advances in the field.

We would like to gather together original research articles on any aspect of PnCs. Contributions related (but not limited) to the following topics are welcome: acoustic characteristics of PnCs, topological properties, energy harvesting strategies, heat control of nanosized PnCs, and control of vibration and noise. In addition, papers on the characterization, fabrication, and theoretical analysis of PnCs are within the scope of this Special Issue. Submissions presenting original results, as well as reviews, are encouraged.

Dr. Yu Cang
Dr. Bin Yang
Dr. Fangxin Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • phononic crystals
  • wave control
  • optomechanics
  • acoustic metamaterials
  • acoustic band gaps
  • topological properties
  • elastic waves
  • energy harvesting
  • thermal transport

Published Papers (3 papers)

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Research

12 pages, 1645 KiB  
Article
Immunity to Backscattering of Bulk Waves in Topological Acoustic Superlattices
by P. A. Deymier, Jérome O. Vasseur, K. Runge, A. Khanikaev and A. Alù
Crystals 2024, 14(4), 344; https://doi.org/10.3390/cryst14040344 - 03 Apr 2024
Viewed by 496
Abstract
We herein investigate the scattering of orthogonal counterpropagating waves and one-way propagating bulk waves in discrete acoustic superlattices subjected to a scattering potential applied to one of the superlattice unit cells. We demonstrate theoretically that the orthogonality of counterpropagating modes does not provide [...] Read more.
We herein investigate the scattering of orthogonal counterpropagating waves and one-way propagating bulk waves in discrete acoustic superlattices subjected to a scattering potential applied to one of the superlattice unit cells. We demonstrate theoretically that the orthogonality of counterpropagating modes does not provide robust protection against backscattering. By contrast, the one-way propagating modes do satisfy a no-reflection condition, i.e., they exhibit immunity to backscattering, for a wide range of applied scattering potentials, which represent defects and disorder. Full article
(This article belongs to the Special Issue Advances and Application of Phononic Crystals)
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13 pages, 1381 KiB  
Article
Pseudo-Spin Polarized One-Way Elastic Wave Eigenstates in One-Dimensional Phononic Superlattices
by Pierre A. Deymier, Keith Runge, Alexander Khanikaev and Andrea Alù
Crystals 2024, 14(1), 92; https://doi.org/10.3390/cryst14010092 - 19 Jan 2024
Cited by 2 | Viewed by 845
Abstract
We investigate a one-dimensional discrete binary elastic superlattice bridging continuous models of superlattices that showcase a one-way propagation character, as well as the discrete elastic Su–Schrieffer–Heeger model, which does not exhibit this character. By considering Bloch wave solutions of the superlattice wave equation, [...] Read more.
We investigate a one-dimensional discrete binary elastic superlattice bridging continuous models of superlattices that showcase a one-way propagation character, as well as the discrete elastic Su–Schrieffer–Heeger model, which does not exhibit this character. By considering Bloch wave solutions of the superlattice wave equation, we demonstrate conditions supporting elastic eigenmodes that do not satisfy the translational invariance of Bloch waves over the entire Brillouin zone, unless their amplitude vanishes for a certain wave number. These modes are characterized by a pseudo-spin and occur only on one side of the Brillouin zone for a given spin, leading to spin-selective one-way wave propagation. We demonstrate how these features result from the interplay of the translational invariance of Bloch waves, pseudo-spins, and a Fabry–Pérot resonance condition in the superlattice unit cell. Full article
(This article belongs to the Special Issue Advances and Application of Phononic Crystals)
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11 pages, 2650 KiB  
Article
Phononic Band Structure by Calculating Effective Parameters of One-Dimensional Metamaterials
by Javier Flores Méndez, Aurelio H. Heredia Jiménez, Gustavo M. Minquiz, A. Morales-Sánchez, Mario Moreno, José Alberto Luna López, Francisco Severiano and A. C. Piñón Reyes
Crystals 2023, 13(6), 931; https://doi.org/10.3390/cryst13060931 - 09 Jun 2023
Viewed by 980
Abstract
Using a theory of homogenization that consists in the discretization of the inclusion of a binary phononic crystal in small volumes, in which the material parameters can be expanded in Fourier series, we have determined the dependence of the effective elastic parameters as [...] Read more.
Using a theory of homogenization that consists in the discretization of the inclusion of a binary phononic crystal in small volumes, in which the material parameters can be expanded in Fourier series, we have determined the dependence of the effective elastic parameters as a function of the frequency. In particular, the frequency dependence of all the elements that constitute the effective tensors of stiffness (moduli of elasticity) and density was analyzed for a 1D phononic crystal conformed of materials whose main characteristic is the high contrast between their elastic properties. In this dynamic case of homogenization, it was found that the effective parameters can reproduce the exact dispersion relations for the acoustic modes that propagate along the periodicity direction of the crystal. Particularly, in the second pass band (high-frequency branch) corresponding to the transverse vibrational modes, the homogenized elastic phononic crystal exhibits a metamaterial behavior because the effective C44-component (shear modulus) and dynamic mass density were found to be both negative. It is noteworthy that the study derived from this homogenization technique can lead to design of double negative metamaterial systems for potential applications. Full article
(This article belongs to the Special Issue Advances and Application of Phononic Crystals)
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