INTRODUCTION: IN MATERIALS SCIENCE, THE RANGE OF PROPERTIES OF METALLIC SYSTEMS CAN BE GREATLY EXTENDED BY TAKING MIXTURES OF ELEMENTS TO GENERATE INTERMETALLIC COMPOUNDS AND ALLOYS. ONE OF THE MAJOR REASONS FOR INTEREST IN ALLOY NANOPARTICLES IS THE FACT THAT THEIR CHEMICAL AND PHYSICAL PROPERTIES MAY BE TUNED BY VARYING THE COMPOSITION AND ATOMIC ORDERING AS WELL AS THE SIZE OF THE CLUSTERS [1]. IN RECENT YEARS, METAMATERIALS HAVE BEEN STUDIED BECAUSE OF ATTRACTIVE PROPERTIES SUCH AS NEGATIVE REFRACTIVE INDEX IN ESPECIAL INCIDENT WAVELENGTH [2]. ON THE OTHER HAND, SCATTERING AND ABSORPTION OF LIGHT BY NANOSTRUCTURES IS ONE OF THE PHYSICISTS & CHEMISTS MOTIVATIONS. MIE COULD PROPOSE EXACT SOLUTION FOR LIGHT SCATTERING OF SPHERICAL NANOPARTICLES BY SOLVING OF MAXWELL'S EQUATIONS IN 1908 [3].IN THIS WORK, WE SUGGEST THAT FOR SPECIAL WAVELENGTH AND NANOHOLES SIZE, THE EFFECTIVE REFRACTIVE INDEX SHOWS NEGATIVE VALUE IN MIE'S THEORY AND HENCE IT COULD BE CONSIDERED AS METAMATERIALS.