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In this paper, proposed plasmonic nanostructure is designed to increase the spatial resolution of optical imaging system by amplifying a specific signal while producing a plasmonic effect via a nanoantenna and grating nanostructure. We utilized antenna theory and grating structure to enable the surface plasmon effect and coupling electric field to be focused center of unit cell and enhance the optical signal of 785 nm wavelength. We confirmed that a proposed plasmonic nanostructure can be useddoi:10.21203/rs.3.rs-1972871/v1 fatcat:gggb2ziitbc6zedxsfyzrwacfm