Total-internal reflection elastic metasurfaces: design and application

Walsh, Timothy; Semperlotti, Fabio; Zhu, Hongfei

Total-internal reflection elastic metasurfaces: design and application

Patent · 24 May 2022

OSTI ID:1892957

Walsh, Timothy; Semperlotti, Fabio; Zhu, Hongfei

An acoustic shield for protecting a vibrational sensitive device includes a first unit cell and a second unit cell. The first unit cell includes a first locally resonant unit. The first locally resonant unit controls a first phase gradient and the first unit cell includes a first surface. The second unit cell includes a second surface proximate to the first surface. The second unit cell includes a second locally resonant unit embedded along the second interface. The second locally resonant unit controls a second phase gradient. The first phase gradient is different from the second phase gradient. The first unit cell and the second unit cell comprise a super cell. The acoustic shield is configured such that a vibrational wave from a first side of the super cell to a second side of the super cell is substantially attenuated.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

DOE Contract Number:: NA0003525;

Assignee:: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Purdue Research Foundation (West Lafayette, IN)

Patent Number(s):: 11,339,845

Application Number:: 16/413,441

OSTI ID:: 1892957

Country of Publication:: United States

Language:: English

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