All‐metallic wide‐angle metasurfaces for multifunctional polarization manipulation-中国期刊网

摘要 Opticalcamouflageisamagicalcapabilityofanimalsasfirstnoticedin1794byErasmusDarwininZoonomia,butcurrentbiomimeticcamouflagestrategiescannotbereadilyappliedincomplexenvironmentsinvolvingmultispectralandinparticularmulti-polarizationdetection.Herewedevelopaplasmonicapproachtowardbroadbandinfraredpolarimetriccrypsis,wherethepolarizedthermalemissionnearthepseudo-Brewsterangleisthemainsignalsourceandnoexistingpolarizingcamouflagetechniquehasbeendiscoveredinnature.Basedonall-metallicsubwavelengthstructures,anelectrodynamicresistance-reductionmechanismisproposedtoavoidthesignificantpolarization-dependentinfraredabsorption/radiation.Itisalsofoundthatthestructuredmetalsurfacepresentsgiantextrinsicanisotropyregardingthephaseshiftbetweenorthogonalpolarizationstates,whichhelpstorealizeultrahigh-efficiencyandtunablepolarizationconversioninanunprecedentedmanner.Finally,wenotethatthecatenaryopticaltheorymayprovideausefulmeanstoexplainandpredicttheseunusualperformances.

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All‐metallic wide‐angle metasurfaces for multifunctional polarization manipulation

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All‐metallic wide‐angle metasurfaces for multifunctional polarization manipulation

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