7 May 2018 Optical planar filter for visible RGB resonance
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We show that a planar metal-dielectric-metal structure has a resonant characteristic that can be used to filter specific colors of the visible spectrum depending of the choice of the material used in the dielectric layer. The resonance occurs when the reflection phase is canceled out with the phase of the propagation. We numerically demonstrate a structure that can be used as an RGB optical filter with three different dielectric materials, with transmission of above 60%. The planar structure exhibits wide-angle transmission for angles of incidence up to 50° for the red and blue colors and up to 30° for the green color.
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I. L. Gomes de Souza, I. L. Gomes de Souza, D. Franco Rego, D. Franco Rego, V. F. Rodriguez-Esquerre, V. F. Rodriguez-Esquerre, "Optical planar filter for visible RGB resonance", Proc. SPIE 10671, Metamaterials XI, 106712E (7 May 2018); doi: 10.1117/12.2306444; https://doi.org/10.1117/12.2306444

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