Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and Refractors
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https://doi.org/10.1103/PhysRevApplied.11.014023 |
Metadatos
Título
Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and RefractorsFecha de publicación
2019-01-11Editor
American Physical SocietyISSN
2331-7019Cita bibliográfica
Packo, P., Norris, A. N., & Torrent, D. (2019). Inverse grating problem: Efficient design of anomalous flexural wave reflectors and refractors. Physical Review Applied, 11(1), 014023.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.11.014023Versión
info:eu-repo/semantics/publishedVersionResumen
We present an extensive formulation of the inverse grating problem for flexural waves in which the energy of each diffracted mode is selected and the grating configuration is then obtained by our solving a linear ... [+]
We present an extensive formulation of the inverse grating problem for flexural waves in which the energy of each diffracted mode is selected and the grating configuration is then obtained by our solving a linear system of equations. The grating is designed as a lineal periodic repetition of a unit cell comprising a cluster of resonators attached at points whose physical properties are directly derived by inversion of a given matrix. Although both active and passive attachments can be required in the most-general case, it is possible to find configurations with only passive (i.e., damped) solutions. This inverse design approach is an alternative to the design of metasurfaces for flexural waves, overcoming the limitations of gradient phase metasurfaces, which require a continuous variation of the surface’s impedance. When the grating is designed in such a way that all the energy is channeled into a single diffracted mode, it behaves as an anomalous refractor or reflector. The negative refractor is analyzed in depth, and it is shown that with only three scatterers per unit cell is it possible to build such a device with unitary efficiency. [-]
Publicado en
Physical review applied, Vol. 11, Iss. 1 (january 2019)Entidad financiadora
National Science Foundation | Office of Naval Research | National Centre for Research and Development | Ramón y Cajal | U.S. Office of Naval Research
Código del proyecto o subvención
EFRI 1641078 | N00014-13-1-0631 | LIDER/317/L6/14/NCBR/2015 | RYC-2016-21188 | N00014-17-1-2445
Título del proyecto o subvención
MURI Grant | LIDER research programme
Derechos de acceso
© 2019 American Physical Society
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