GRADIENT-INDEX PHONONIC CRYSTAL FLAT LENS AND DESIGN METHOD FOR SAME

    公开(公告)号:US20230360629A1

    公开(公告)日:2023-11-09

    申请号:US17777465

    申请日:2020-11-11

    IPC分类号: G10K11/30 G10K11/24 G02B1/00

    CPC分类号: G10K11/30 G02B1/005 G10K11/24

    摘要: A gradient-index phononic crystal flat lens which controls the behavior of an acoustic wave having a designated frequency. The gradient-index phononic crystal flat lens may include one or more super cells each having a plurality of layers stacked in a vertical direction according to a target gradient index profile, wherein each of the layers is composed of an aggregate in which unit cells having scatterers formed with the same size in the centers thereof are arranged in a horizontal direction. The one or more super cells may each include a divider provided between the neighboring layers, and configured to force the acoustic wave to propagate in the horizontal direction within the gradient-index phononic crystal flat lens.