Frequency-dependent acoustic energy focusing in hexagonal ceramic micro-scaffolds

Grabec, Tomáš; Koller, Martin; Sedlák, Petr; Kruisová, Alena; Román-Manso, Benito; Belmonte, Manuel; Miranzo, P.; Seiner, Hanuš

doi:10.1016/j.wavemoti.2019.102417

Cited by 9 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the recent interest on the dynamics of quasiperiodic systems, their dispersion and wave directionality properties are still largely unexplored or scarce. Indeed, wave directionality finds applications that involve wave filtering and guiding, ultrasonic therapy and imaging, antennas, sensors and lenses; however, the wave fronts are currently restricted to known crystallographic symmetries (e.g., bilayer, square and hexagonal) [48][49][50][51][52][53][54][55][56]. As we illustrate herein, quasiperiodic configurations expand the wave directionality and beaming possibilities beyond the symmetries of periodic arrangements.…”

Section: Introductionmentioning

confidence: 92%

Wave beaming and diffraction in quasicrystalline elastic metamaterial plates

Beli¹,

Rosa²,

Marqui³

et al. 2022

Preprint

View full text Add to dashboard Cite

In this paper, we present numerical and experimental evidence of directional wave behavior, i.e. beaming and diffraction, along high-order rotational symmetries of quasicrystalline elastic metamaterial plates. These structures are obtained by growing pillars on an elastic plate following a particular rotational symmetry arrangement, such as 8-fold and 10-fold rotational symmetries, as enforced by a design procedure in reciprocal space. We estimate the dispersion properties of the waves propagating in the plates through Fourier transformation of transient wave-fields. The procedure identifies, both numerically and experimentally, the existence of anisotropic bands characterized by high energy density at isolated regions in reciprocal space that follow their higher order rotational symmetry. Specific directional behavior is showcased at the identified frequency bands, such as wave beaming and diffraction. This work expands the wave directionality phenomena beyond the symmetries of periodic configurations (e.g., 4-fold and 6-fold), and opens new possibilities for applications involving the unusual high-order wave features of the quasicrystals such as superior guiding, focusing, sensing and imaging.

show abstract

Section: Introductionmentioning

confidence: 92%

Wave beaming and diffraction in quasicrystalline elastic metamaterial plates

Beli¹,

Rosa²,

Marqui³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[8] Traditionally, AMMs have operated through locally resonating elements, [31] as seen in colloidal suspensions (Figure 1a), [32][33][34] Helmholtz resonators (Figure 1b), [35][36][37] and membrane-type ( Figure 1c), [38,39] structures. PC lattices (Figure 1d), [40,41] and Figure 1 shows the general examples of six common structures found in AMMs and PC designs. a) Colloidal metamaterial consisting of spherical particles within a fluid medium.…”

Section: Types Of Structuresmentioning

confidence: 99%

“…[81] Dimensions of printed parts typically fall within the range of 100 μm-10 cm, but fine deposition nozzles can have diameters of 10 μm for higher-resolution printing. DIW technology can fabricate ultrasonic ceramic-based PCs as tight scaffolds of micronscale rods (Figure 2a) [40,82] for sound damping (100-800 kHz) and acoustic focusing (2-12 MHz) applications. Here, each extruded line corresponds to the width of one rod.…”

Section: Printing Technologiesmentioning

confidence: 99%

Section: Types Of Structuresmentioning

confidence: 99%

“…[86] Copyright 2017, The Authors, published by Springer Nature Limited), b) labyrinthine structures [1,5,42,43,74,93,95,96,160,161] (Image reproduced with permission. [74] Copyright 2013, AIP Publishing LLC), and c) crystal lattice structures [40,60,62,76,82,83,84,94,97,98,103,104,162] (Image reproduced with permission. [84] Copyright 2020, AIP Publishing LLC).…”

Section: Conflict Of Interestmentioning

confidence: 99%

See 2 more Smart Citations

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

et al. 2020

View full text Add to dashboard Cite

Acoustic metamaterials (AMMs) and phononic crystals (PCs) have garnered significant attention in recent years, as part of the collective driving force toward creating intelligent acoustic devices. Advancements in these fields have greatly enhanced the way we manipulate sound waves through transmission, reflection, refraction, absorption, diffraction, or attenuation. In the past decade, AMMs and PCs have enabled novel applications such as acoustic lensing, [1-3] cloaking, [4] levitation, [5] and holography. [6-8] While these exotic structures have been well explored through theoretical and numerical analysis, [9-13] their physical realization is an important topic that is rarely discussed. Considering the ubiquity of sound and the powerful capabilities of AMMs and PCs, the impact of these acoustic structures could be phenomenal. Across the full acoustic frequency spectrum, practical applications such as noise cancellation, [14] underwater detection, [15] medical imaging, [16] and energy harvesting [17,18] could benefit key sectors in our society like healthcare, well-being, environmental sustainability, and security. Moreover, AMMs and PCs can help to usher in next-generation technologies for personalized, immersive multisensory [19-22] experiences. The manipulation of sound can enrich the way we communicate and interact with our surroundings, not simply through audio, but also through tactile sensations. In the future, AMMs and PCs could be used in virtual reality (VR) setups, [23] compact wearable devices, and dynamic midair volumetric displays [24] that are controllable and capable of providing haptic feedback. [25] Beyond the notion that AMMs and PCs can replace phased arrays, they could readily complement one another for more precise control. In commercial devices, AMM and PC functionalities could even be combined together in different ways, e.g., transmissive and sound absorptive structures, for improved performance. To unlock the full potential of AMMs and PCs, it is therefore vital to ensure that practical, physical realization is pursued alongside theoretical investigation in the development of viable acoustic designs. Building an AMM or PC requires some form of fabrication or assembly or both. Fabrication refers to the technologies and processes used to manufacture an object, whereas assembly refers to the strategic amalgamation of parts for a constructive purpose.

show abstract

A review on additive manufacturing of wave controlling metamaterial

Zhang

2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Frequency-dependent acoustic energy focusing in hexagonal ceramic micro-scaffolds

Cited by 9 publications

References 31 publications

Wave beaming and diffraction in quasicrystalline elastic metamaterial plates

Wave beaming and diffraction in quasicrystalline elastic metamaterial plates

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

A review on additive manufacturing of wave controlling metamaterial

Contact Info

Product

Resources

About