Robust double-spectral transparency of double mutually staggered plasmonic arrays sandwiched by two continuous metal films

We theoretically investigate the optical properties of a late-model plasmonic nanostructure consisting of double mutually staggered silver (Ag) nanoparticle arrays sandwiched by two continuous Ag films. Double robust plasmonic resonances with transmission both more than 86% are achieved via the cooperative effects of plasmon gap modes and optical cavity modes. The transparency response can be efficiently modified by varying the diameter of nanoparticles, the distance between the plasmonic arrays and the metal films, the dielectric environment, the thickness of the double film and the gap distance between the double mutually staggered plasmonic Ag nanoparticle arrays. The structure proposed here may provide potential applications in highly integrated optoelectronic devices, such as transparent conductors, plasmonic filters and sensors.