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1、PAPER•OPENACCESSRelatedcontent-RoadmaponopticalmetamaterialsPerformingmathematicaloperationsusinghigh-AugustineMUrbas,ZubinJacob,LucaDalNegroetal.indexacousticmetamaterials-ExperimentalrealizationforabnormalreflectioncausedbyanacousticmetasurfacewithsubwavelengthaperturesTocitethisart
2、icle:FarzadZangeneh-NejadandRomainFleury2018NewJ.Phys.20073001XuanjunLiu,XinwuZeng,DongbaoGaoetal.-Metamaterial,plasmonicandnanophotonicdevicesFrancescoMonticoneandAndreaAlùViewthearticleonlineforupdatesandenhancements.ThiscontentwasdownloadedfromIPaddress61.174.131.57on13/08/2018at04
3、:01NewJ.Phys.20(2018)073001https://doi.org/10.1088/1367-2630/aacba1PAPERPerformingmathematicaloperationsusinghigh-indexacousticOPENACCESSmetamaterialsRECEIVED5March2018FarzadZangeneh-NejadandRomainFleuryREVISEDLaboratoryofWaveEngineering,EPFL,1015Lausanne,Switzerland23May2018E-mail:ro
4、main.fleury@epfl.chACCEPTEDFORPUBLICATION11June2018Keywords:analogcomputing,acoustics,metamaterials,edgedetection,slabwaveguidesPUBLISHED4July2018AbstractOriginalcontentfromthisworkmaybeusedunderTherecentbreakthroughinmetamaterial-basedopticalcomputingdevices(2014Science343160)hastheter
5、msoftheCreativeCommonsAttribution3.0inspiredaquestforsimilarsystemsinacoustics,performingmathematicaloperationsonsoundwaves.licence.Sofar,acousticanalogcomputinghasbeendemonstratedusingthinplanarmetamaterials,carryingAnyfurtherdistributionofthisworkmustmaintainouttheoperatorofchoicein
6、Fourierdomain.Theseso-calledfilteringmetasurfaces,however,areattributiontothealwaysaccompaniedwithadditionalFouriertransformsub-blocks,enlargingthecomputingsystemauthor(s)andthetitleofthework,journalcitationandpreventingitsapplicabilityinminiaturizedarchitectures.Here,employingasimpleh
7、igh-indexandDOI.acousticslabwaveguide,weproposeahighlycompactandpotentiallyintegrableacousticcomputingsystemanddemonstrateitsproperfunctioningbynumericalsimulations.ThesystemdirectlyperformsmathematicaloperationinspatialdomainandisthereforefreeofanyFourierbulklens.Suchcompactcomputing
8、syste
