AI Article Synopsis
- An array of subwavelength slits in a metallic substrate creates multiple resonances, leading to distinct transmission peaks similar to Fabry-Perot resonators.
- The introduction of additional slits per period results in a more complex grating structure, enhancing the overall resonance behavior.
- This study explores the relationship between these resonances and the band structure of diffractively coupled surface waves, providing deeper insight into the underlying mechanisms.
Article Abstract
An array of subwavelength slits in a metallic substrate supports a series of Fabry-Perot-like resonances, where each harmonic results in a transmission peak. Addition of extra slits per period yields a compound grating with a structure factor associated with the basis. In this study each repeat period is comprised of a central slit flanked by a pair of narrower slits. It supports three resonances for every Fabry-Perot-like solution. New and useful insight into this phenomenon is gained by describing each of the modes in terms of the band structure of diffractively coupled surface waves.
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| http://dx.doi.org/10.1103/PhysRevLett.96.257402 | DOI Listing |
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