000218992 001__ 218992
000218992 005__ 20190317000456.0
000218992 0247_ $$2doi$$a10.1103/PhysRevB.94.014302
000218992 022__ $$a2469-9969
000218992 02470 $$2ISI$$a000378909300003
000218992 037__ $$aARTICLE
000218992 245__ $$aAcoustic carpet cloak based on an ultrathin metasurface
000218992 269__ $$a2016
000218992 260__ $$bAmer Physical Soc$$c2016$$aCollege Pk
000218992 300__ $$a9
000218992 336__ $$aJournal Articles
000218992 520__ $$aAn acoustic metasurface carpet cloak based on membrane-capped cavities is proposed and investigated numerically. This design has been chosen for allowing ultrathin geometries, although adapted to airborne sound frequencies in the range of 1 kHz (λ≈30 cm), surpassing the designs reported in the literature in terms of thinness. A formulation of generalized Snell's laws is first proposed, mapping the directions of the incident and reflected waves to the metasurface phase function. This relation is then applied to achieve a prescribed wavefront reflection direction, for a given incident direction, by controlling the acoustic impedance grading along the metasurface. The carpet cloak performance of the proposed acoustic metasurface is then assessed on a triangular bump obstacle, generally considered as a baseline configuration in the literature.
000218992 6531_ $$aacoustic metasurface
000218992 6531_ $$acarpet cloak
000218992 700__ $$aEsfahlani, Hussein
000218992 700__ $$aKarkar, Sami
000218992 700__ $$aLissek, Herve
000218992 700__ $$g105917$$aMosig, Juan R.$$0240432
000218992 773__ $$j94$$tPhysical Review B$$k1$$q014302
000218992 8564_ $$uhttps://infoscience.epfl.ch/record/218992/files/PhysRevB.94.014302.pdf$$zPublisher's version$$s2357266$$yPublisher's version
000218992 909C0 $$xU10380$$0252392$$pLTS2
000218992 909C0 $$pLEMA$$xU10374$$0252091
000218992 909CO $$qGLOBAL_SET$$pSTI$$particle$$ooai:infoscience.tind.io:218992
000218992 917Z8 $$x157878
000218992 937__ $$aEPFL-ARTICLE-218992
000218992 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000218992 980__ $$aARTICLE