Deep-learning-aided metasurface design for megapixel acoustic hologram

Applied Physics Reviews, Journal Year: 2023, Volume and Issue: 10(2)

Published: May 30, 2023

Unlike the holography technique using active sound source arrays, metasurface-based can avoid cumbersome circuitry and only needs a single transducer. However, large number of individually designed elements with unique amplitude phase modulation capabilities are often required to obtain high-quality holographic image, which is non-trivial task. In this paper, deep-learning-aided inverse design an acoustic hologram millions reconstruct megapixel pictures reported. To improve imaging quality, iterative compensation algorithm proposed remove interference fringes unclear details images. A image Mona Lisa's portrait reconstructed by 2000 × hologram. Finally, experimentally validated metasurface consisting 30 three-dimensional printed that reproduce eye part portrait. It shown sparse arrangement produce images even when has fewer than targeted pixels.

Language: Английский

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Bistable reconfigurable origami metamaterials with high load-bearing and low state-switching forces

Extreme Mechanics Letters, Journal Year: 2023, Volume and Issue: 63, P. 102064 - 102064

Published: Aug. 14, 2023

Language: Английский

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A tunable sound absorber with perfect sound absorption for suppressing acoustic waves of different intensities

Journal of Sound and Vibration, Journal Year: 2024, Volume and Issue: 577, P. 118306 - 118306

Published: Jan. 25, 2024

Language: Английский

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Dynamic Acoustic Beamshaping with Coupling‐Immune Moiré Metasurfaces

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: Feb. 21, 2024

Moiré effects arising from mutually twisted metasurfaces have showcased remarkable wave manipulation capabilities, unveiling tantalizing emerging phenomena such as acoustic moiré flat bands and topological phase transitions. However, the pursuit of strong near-field coupling in layers has necessitated to be tightly stacked at narrow distances subwavelength range. Here, beyond interlayer acoustics are reported concept coupling-immune is proposed. Remote decoupled distance theoretically, numerically, experimentally demonstrated. Tunable out-of-plane beam scanning successfully achieved by dynamically controlling twist angles. The engineered properties further extended multilayered vortices. Good robustness against external disturbances also observed for fabricated metasurfaces. presented work unlocks potential devices shaping, enabling practical applications remote dynamic detection, multiplexed underwater communication.

Language: Английский

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Metamaterial robot driven by nonlinear elastic waves with stop band and nonreciprocal crawling

Nonlinear Dynamics, Journal Year: 2024, Volume and Issue: 112(8), P. 5825 - 5845

Published: Feb. 24, 2024

Language: Английский

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