Role of propagating slit mode in enhanced transmission through slit arrays in a metallic films |
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| Authors: | Viktoriia E Babicheva Yurii E Lozovik |
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| Institution: | 1. Moscow Institute of Physics and Technology State University, Institusky Pereulok, 9, 141700, Dolgoprundny, Moscow Region, Russia
2. Institute of Spectroscopy of Russian Academy of Sciences, Fizicheskaya ulica, 5, 142190, Troitsk, Moscow region, Russia
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| Abstract: | The mechanisms responsible for enhanced transmission of electromagnetic wave through an array of subwavelength slits in a metallic film are analyzed. Theoretical model of the enhanced transmission which takes into account the penetration of electromagnetic field into real metal is developed. Semi-analytical model based on Fabry–Perot formula is considered. Comparison of theoretical model, semi-analytical model and results of numerical simulation of Maxwell equations in time-dependent form (FDTD method) for silver with various geometric parameters is presented. The roles of surface plasmons and plasmon localized along slits are studied. |
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