Resonant Beam Steering and Carpet Cloaking Using an Acoustic Transformational Metascreen
Permanent link to this recordhttp://hdl.handle.net/10754/631497
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AbstractWe invoke the Huygens principle to derive dispersion characteristics of acoustic transformational metasurfaces that can deflect parallel wavefronts in a desired direction. We also propose a dual-Lorentz resonator whose aperture fields can be tuned by geometrical changes to implement a particular phase with unity reflection coefficient. The proposed metascreen is designed by our arranging slightly detuned Lorentz cavities that generate the necessary interference to compensate for the incident wavefronts. Since a complete 0-2π range of the reflection phase is achieved, the metascreen can steer a beam across the full horizon. Moreover, since the proposed dual resonator has subwavelength dimensions, the metascreen is capable of high-resolution imaging, which is an essential trait in cloaking and deceptive acoustics. Successful demonstration of acoustic beam steering and carpet cloaking is done for a wavelength of 790 mm with the help of full-wave simulations.
CitationAmin M, Siddiqui O, Orfali W, Farhat M, Khelif A (2018) Resonant Beam Steering and Carpet Cloaking Using an Acoustic Transformational Metascreen. Physical Review Applied 10. Available: http://dx.doi.org/10.1103/PhysRevApplied.10.064030.
SponsorsW.O. acknowledges the Deanship of Scientific Research, Taibah University, under Grant No. 431/777.
PublisherAmerican Physical Society (APS)
JournalPhysical Review Applied