Periodic metallo-dielectric structures: Electromagnetic absorption and its related developed temperatures

Document Type

Article

Publication Date

7-1-2019

Abstract

Multi-layer, metallo-dielectric structures (screens) have long been employed as electromagnetic band filters, either in transmission or in reflection modes. Here we study the radiation energy not transmitted or reflected by these structures (trapped radiation, which is denoted-absorption). The trapped radiation leads to hot surfaces. In these bi-layer screens, the top (front) screen is made of metallic hole-array and the bottom(back) screen ismade ofmetallic disk-array. The gap between themis filled with an array of dielectric spheres. The spheres are embedded in a dielectric host material, which is made of either a heat-insulating (air, polyimide) or heat-conducting (MgO) layer. Electromagnetic intensity trapping of 97% is obtained when a 0.15 micron gap is filled with MgO and Si spheres, which are treated as pure dielectrics (namely, with no added absorption loss). Envisioned applications are anti-fogging surfaces, electromagnetic shields, and energy harvesting structures.

Identifier

85068881310 (Scopus)

Publication Title

Materials

External Full Text Location

https://doi.org/10.3390/ma12132108

e-ISSN

19961944

Issue

13

Volume

12

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