Energy focusing of broadband Lamb wave by designing excitation waveforms and elastic metamaterials

Du, Daiyao; Hua, Jiadong; Cui, Chun; Lin, Jing

doi:10.1016/j.ultras.2024.107294

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2024

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Cited by 2 publications

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Time-reversing Ultrasonic Transducer for Guided Wave Inspections

Mohammadgholiha,

De Marchi

2024

2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)

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Time-reversing Ultrasonic Transducer for Guided Wave Inspections

Mohammadgholiha,

De Marchi

2024

2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)

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Opto-Induced Topological Waveguide Transport in Metaplates

Liang,

Liu,

2024

Int. J. Appl. Mechanics

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The introduction of wise materials into topological metamaterial design has become a hot topic. In this paper, by using liquid crystal elastomer film as the scatterer, an opto-topological metaplate is proposed. By changing the illumination pattern, spatial inversion symmetry is broken and opto-modulation of topological interface state is achieved. First, opto-deformation of the liquid crystal elastomer scatterer is investigated. Then the degeneracy and topological phase transition are discussed. The formation of the topological interface state and its robustness against geometric perturbations are demonstrated. At last, the parameter analysis is carried out to clarify the influence of scatterer radius and light intensity on the performance of metaplates. The results indicate that illumination can be utilized as a flexible switch to turn on/off topological waveguide transmission. The frequency region of the interface state relies on the scatterer radius and illumination intensity. The research about the opto-topological modulation of metaplate provides a new strategy in the design and fabrication of metamaterials.

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Energy focusing of broadband Lamb wave by designing excitation waveforms and elastic metamaterials

Cited by 2 publications

References 25 publications

Time-reversing Ultrasonic Transducer for Guided Wave Inspections

Time-reversing Ultrasonic Transducer for Guided Wave Inspections

Opto-Induced Topological Waveguide Transport in Metaplates

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