Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and Refractors
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https://doi.org/10.1103/PhysRevApplied.11.014023 |
Metadades
Títol
Inverse Grating Problem: Efficient Design of Anomalous Flexural Wave Reflectors and RefractorsData de publicació
2019-01-11Editor
American Physical SocietyISSN
2331-7019Cita bibliogràfica
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.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.11.014023Versió
info:eu-repo/semantics/publishedVersionResum
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. [-]
Publicat a
Physical review applied, Vol. 11, Iss. 1 (january 2019)Entitat finançadora
National Science Foundation | Office of Naval Research | National Centre for Research and Development | Ramón y Cajal | U.S. Office of Naval Research
Codi del projecte o subvenció
EFRI 1641078 | N00014-13-1-0631 | LIDER/317/L6/14/NCBR/2015 | RYC-2016-21188 | N00014-17-1-2445
Títol del projecte o subvenció
MURI Grant | LIDER research programme
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© 2019 American Physical Society
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