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Coding acoustic metasurfaces

WebApr 9, 2024 · The dimensions of the breast are 615 × 752 × 495 pixels (2D cross-section dimensions: 615 × 752 pixels, for an effective physical size of breasts of 12.3 cm × 15.04 cm). The cross-section was chosen roughly at the midpoint of the breast along the z-axis. Values used for acoustic, thermal, and optical properties in the simulation are shown ... WebJan 1, 2024 · By introducing the addition principle into the design theory and encoding different metasurfaces, the corresponding scattered beams can be superimposed to achieve the arbitrary modulation of the...

Frontiers Binary acoustic metasurfaces for dynamic focusing of ...

WebDec 18, 2024 · However, the previous acoustic coding metasurfaces work at a single frequency and have only one function under a specific arrangement, limiting the efficiency and capacity of manipulation to a low ... WebApr 4, 2024 · In this paper, we propose a kind of reflection-type broadband acoustic coding metasurfaces (BACMs), which are composed of two square helical channels and the connected air cavity at the end of the channels. This helical-cavity coupled structure is selected as a logical unit “1,” the pure air hole is set as a logical unit “0,” and the ... books by the foot canada https://edwoodstudio.com

A reflective acoustic meta-diffuser based on the coding meta …

WebFeb 1, 2024 · By programming the coding sequences, acoustic metasurfaces with various functions, including creating peculiar antenna patterns and waves focusing, have been … Web摘要： Acoustic metasurfaces display unprecedented potential for their unique and flexible capabilities of wave front manipulations. Although rapid progress and significant developments have been achieved in this field, it still remains a significant challenge to obtain an acoustic metasurface that can perform different functions in three-dimensional … WebApr 1, 2024 · As an analogue of the binary acoustic metasurfaces (BAMs), the sparse binary elastic metasurfaces (SBEMs) which consist of two different coding units with sparse arrangement is designed. A systematic design method based on topology optimization (TO) is developed to search the coding units. books by the foot coupon code

[2206.14398] Active Coding Piezoelectric Metasurfaces - arXiv.org

Category:Pentamode-Based Coding Metasurface for Underwater Acoustic …

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Coding acoustic metasurfaces

Frequency‐Dependent Dual‐Functional Coding Metasurfaces at …

WebAug 11, 2024 · Transcranial focused ultrasound (tFUS) is a promising technique for non-invasive and spatially targeted neuromodulation and treatment of brain diseases. Acoustic lenses were designed to correct the skull-induced beam aberration, but these designs could only generate static focused ultrasound beams inside the brain. Here, we designed and … WebMay 13, 2024 · The concept of coding acoustic metasurfaces provides a neat approach to implementing tunable acoustic focusing. Researchers have proposed some coding acoustic metasurfaces which can implement acoustic focusing.

Coding acoustic metasurfaces

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Web2 days ago · Download Citation Bubble-type coding metasurfaces for broadband deep subwavelength underwater acoustic manipulations We construct a reflective broadband acoustic coding metasurface using ... WebOct 18, 2024 · Here, we propose a general theory of space-time modulated digital coding metasurfaces to obtain simultaneous manipulations of EM waves in both space and …

WebOct 17, 2024 · By using a phase difference of precisely π, coding acoustic metasurfaces are experimentally demonstrated. Google Scholar Bok, E. et al. Metasurface for water-to …

WebDec 18, 2024 · Recently, coding metasurfaces have been demonstrated to realize fascinating functions in acoustics, including far-field modulation, focusing, and vortex … WebAug 19, 2024 · In this work, we present a type of binary metasurface (BM) to generate an acoustic Airy beam in air. Two coding bits, a rectangular cavity (bit “0”) and a waveguide with seven Helmholtz resonators (bit “1”), are adopted to construct the acoustic structure, which offers degrees of freedom to manipulate the transmitted field.

WebHere, we design an acoustic coding metasurface (ACM) lens to achieve a broadband tunable focusing in air. This simple ACM lens only includes two coding bits: a space-folding structure is designed to act as the bit '1' and an air unit …

WebNov 25, 2024 · An acoustic Talbot coding metasurface. An array of 2 × 2 elements forms a basic unit cell of the coding metasurface. Each element can provide one of the 0, π/2, π, and 3π/2 phase-delay responses as one state in a 2-bit 4-digital states “00”, “01”, “10”, and “11.” With carefully designing each unit cell from four phase-mask ... harvest snap peas snacksWebApr 6, 2024 · Thirdly, the repaid development of coding and programmable metamaterials and metasurfaces has provided a flexible method to achieve the frequency-tunable wavefront modulation in electromagnetics, which has been witnessed in the past few years [25, 26]. Inspired by these concepts, analogous coding acoustic metasurfaces have … books by the bushel order formWebApr 2, 2024 · Investigations on coding metasurfaces have been extended to acoustics [5], [19], [47], [48]. For instance, Xie et al. have proposed the concept of coding acoustic metasurface [19] and achieved the multifunctional modulation by shifting the transmitted phases on the surface in real time [49]. However, some existing coding AMs have … books by the foot frederick mdWebDec 6, 2016 · Graphical Abstract. Coding acoustic metasurfacescan combine simple logical bits to acquire sophisticated functions in … books by the foot scamWebMay 13, 2024 · Abstract. Acoustic focusing has been widely applied in biological and industrial fields. In this work, a coding acoustic metasurface consisting of two kinds of … books by the informerWebProgrammable metasurfaces have attracted significant attention in various applications such as radar and 6G communications, owing to their ability freely shape the far-field pattern. However, complex calculations and simulations are always required when designing specific far-field patterns, especially when irregular obstacles are outside the … books by the metreWebJan 11, 2024 · Here, the authors report an approach for creating various acoustic wavefronts in free space by using soft gradient-index porous metasurfaces. These flat lenses generate steered planar, focused ... books by the pound ga