Biblio
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2022. Acoustic Wave Focusing Lens at Radio Frequencies in Thin-Film Lithium Niobate. 2022 IEEE MTT-S International Conference on Microwave Acoustics and Mechanics (IC-MAM). :9—12.
Expanding techniques for chip-scale acoustic wave focusing would open doors for advancements in signal processing and quantum electromechanical microsystems. In this paper, we present a method for acoustic wave focusing and wavefront shaping at radio frequencies (RF), validated with thin-film lithium niobite on a low-loss and high coupling silicon carbide (LiNbO3-on-SiC) testbed. By depositing a metal layer, we can mitigate the piezoelectric stiffening effect, and reduce the acoustic wave speed in a patterned area. Employing a design analogous to geometric optical systems, efficient acoustic wave focusing is experimentally observed. With more development, this technique could be employed in emerging acoustic microsystems.
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2020. Topologically Protected Acoustic Wave Amplification in an Optomechanical Array. 2020 Conference on Lasers and Electro-Optics (CLEO). :1–2.
By exploiting the simultaneous particle-conserving and particle-nonconserving phonon-photon interactions in an optomechanical array, we find a topologically protected edge state for phonons that can be parametrically amplified when all the bulk states remain stable.