Acoustic logic gates and Boolean operation based on self-collimating acoustic beams

Zhang, Ting; Cheng, Ying; Guo, Jianzhong; Xu, Jianyi; Liu, Xiaojun

doi:10.1063/1.4915338

Cited by 39 publications

(29 citation statements)

References 21 publications

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“…Next, we harness MRPs to design magnetoactive reconfigurable acoustic logic gates (Figure 4). Existing acoustic logic gates primarily rely on designed acoustic metastructures with fixed geometries [16][17][18][19], and very few of them can switch logic operators with tethered interventions [20]. Reconfigurable acoustic logic gates that can on-demand switch operators by untethered stimuli have not been explored.…”

Section: Magnetoactive Reconfigurable Acoustic Logic Gatementioning

confidence: 99%

“…Acoustic metamaterials with tailored architectures exhibit unconventional capability in controlling acoustic waves [1][2][3][4][5] and have enabled a wide range of previously unachievable applications, such as superlensing [6][7][8][9][10][11][12], cloaking [13][14][15], logic operation [16][17][18][19][20], nonreciprocal propagation [21][22][23][24][25], topological insulation [20,[26][27][28][29], and wave guiding [30,31]. Despite the diverse applications, most of the existing paradigms rely on architected structures with fixed configurations, and thus, their properties cannot be modulated once the structures are fabricated [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Sharkskin-Inspired Magnetoactive Reconfigurable Acoustic Metamaterials

Lee

Ba’ba’a

et al. 2020

Research

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Most of the existing acoustic metamaterials rely on architected structures with fixed configurations, and thus, their properties cannot be modulated once the structures are fabricated. Emerging active acoustic metamaterials highlight a promising opportunity to on-demand switch property states; however, they typically require tethered loads, such as mechanical compression or pneumatic actuation. Using untethered physical stimuli to actively switch property states of acoustic metamaterials remains largely unexplored. Here, inspired by the sharkskin denticles, we present a class of active acoustic metamaterials whose configurations can be on-demand switched via untethered magnetic fields, thus enabling active switching of acoustic transmission, wave guiding, logic operation, and reciprocity. The key mechanism relies on magnetically deformable Mie resonator pillar (MRP) arrays that can be tuned between vertical and bent states corresponding to the acoustic forbidding and conducting, respectively. The MRPs are made of a magnetoactive elastomer and feature wavy air channels to enable an artificial Mie resonance within a designed frequency regime. The Mie resonance induces an acoustic bandgap, which is closed when pillars are selectively bent by a sufficiently large magnetic field. These magnetoactive MRPs are further harnessed to design stimuli-controlled reconfigurable acoustic switches, logic gates, and diodes. Capable of creating the first generation of untethered-stimuli-induced active acoustic metadevices, the present paradigm may find broad engineering applications, ranging from noise control and audio modulation to sonic camouflage.

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Section: Magnetoactive Reconfigurable Acoustic Logic Gatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sharkskin-Inspired Magnetoactive Reconfigurable Acoustic Metamaterials

Lee

Ba’ba’a

et al. 2020

Research

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“…As a result of their capacity to tailor the dispersion of elastic waves, the phononic crystals (PCs) are instrumental in a large number of systems such as acoustic lenses [1], acoustic diodes [2] and even logic gates [3]. Among several other devices, the waveguides are basic but essential components in many integrated acoustic circuits, in particular in the micro-electro-mechanical systems (MEMS) where Lamb and/or surface acoustic waves play a fundamental role.…”

Section: Introductionmentioning

confidence: 99%

“…In many studies, they are based on the special modulus of particular equal frequency contours (EFCs) that allow for the wave to propagate in a self-collimating way [4][5][6]. However, this approach only applies for incident waves with a Gaussian profile and when the waveguide consists of uniform cells [3][4][5]. Moreover, it may suffer geometrical aberrations if the device is composed of graded structures [6].…”

Section: Introductionmentioning

confidence: 99%

Compact Waveguide and Guided Beam Pattern Based on the Whispering-Gallery Mode of a Hollow Pillar in a Phononic Crystal Plate

et al. 2018

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We report on the experimental evidence of the guiding of the lowest order antisymmetric Lamb mode (A0) through a compact waveguide consisting of aligned hollow pillars in between a squarelatticed array of solid pillars on a thin slab. We analyze both numerically and experimentally the guiding achievements and we highlight the role played by the whispering gallery mode of the hollow pillars. In particular, we highlight the evolution of the displacement field pattern behind the waveguide that we relate to the emission of a quadrupolar wave interacting with the surrounding solid pillars. We also show the asymmetric transmission of a compact waveguide based on the same mechanism.

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“…Recently, phononic computing has been suggested as a possible strategy to augment electronic and optical computers (18) or even facilitate phononicbased quantum computing (19,20). All-phononic circuits have been theoretically proposed (21,22) and phononic metamaterials (23)(24)(25)(26) have been identified as tools to perform basic logic operations (6,7). Electromechanical logic (27) and transistors (28) operating using multiple frequencies have also been demonstrated.…”

mentioning

confidence: 99%

Bistable metamaterial for switching and cascading elastic vibrations

Bilal

Foehr

Daraio

2017

Proc. Natl. Acad. Sci. U.S.A.

172

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The realization of acoustic devices analogous to electronic systems, like diodes, transistors, and logic elements, suggests the potential use of elastic vibrations (i.e., phonons) in information processing, for example, in advanced computational systems, smart actuators, and programmable materials. Previous experimental realizations of acoustic diodes and mechanical switches have used nonlinearities to break transmission symmetry. However, existing solutions require operation at different frequencies or involve signal conversion in the electronic or optical domains. Here, we show an experimental realization of a phononic transistor-like device using geometric nonlinearities to switch and amplify elastic vibrations, via magnetic coupling, operating at a single frequency. By cascading this device in a tunable mechanical circuit board, we realize the complete set of mechanical logic elements and interconnect selected ones to execute simple calculations.phononic metamaterials | tunable materials | phonon switching and cascading | phononic computing | acoustic transistor T he idea of realizing a mechanical computer has a long established history (1). The first known calculators and computers were both mechanical, as in Charles Babbage's concept of a programmable computer and Ada Lovelace's first description of programing (2). However, the discovery of electronic transistors rapidly replaced the idea of mechanical computing. Phononic metamaterials, used to control the propagation of lattice vibrations, are systems composed of basic building blocks, (i.e., unit cells) that repeat spatially. These materials exhibit distinct frequency characteristics, such as band gaps, where elastic/acoustic waves are prohibited from propagation. Potential applications of phononic metamaterials in computing can range from thermal computing (3-5) (at small scales) to ultrasound and acousticbased computing (6, 7) (at larger scales). Phononic devices analogous to electronic or optical systems have already been demonstrated. For example, acoustic switches (8, 9), rectifiers (10, 11), diodes (12-15), and lasers (16, 17) have been demonstrated both numerically and experimentally. Recently, phononic computing has been suggested as a possible strategy to augment electronic and optical computers (18) or even facilitate phononicbased quantum computing (19,20). All-phononic circuits have been theoretically proposed (21, 22) and phononic metamaterials (23-26) have been identified as tools to perform basic logic operations (6, 7). Electromechanical logic (27) and transistors (28) operating using multiple frequencies have also been demonstrated. Most of these devices operate using electronic signals (26) and/or operate at mixed frequencies. When different frequencies are needed for information to propagate, it becomes difficult, if not impossible, to connect multiple devices in a circuit.Electronic transistors used in today's electronic devices are characterized by their ability to switch and amplify electronic signals. Conventional field-effect tran...

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Acoustic logic gates and Boolean operation based on self-collimating acoustic beams

Cited by 39 publications

References 21 publications

Sharkskin-Inspired Magnetoactive Reconfigurable Acoustic Metamaterials

Sharkskin-Inspired Magnetoactive Reconfigurable Acoustic Metamaterials

Compact Waveguide and Guided Beam Pattern Based on the Whispering-Gallery Mode of a Hollow Pillar in a Phononic Crystal Plate

Bistable metamaterial for switching and cascading elastic vibrations

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