TY - JOUR
T1 - Periodic metallo-dielectric structures
T2 - Electromagnetic absorption and its related developed temperatures
AU - Walker, Jean Paul
AU - Swaminathan, Venkataraman
AU - Haynes, Aisha S.
AU - Grebel, Haim
N1 - Publisher Copyright:
© 2019 by the authors.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - 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.
AB - 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.
KW - Electromagnetic absorption
KW - Electromagnetic filters
KW - Metallo-dielectric structures
KW - Radiation trapping
KW - Temperature rise
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U2 - 10.3390/ma12132108
DO - 10.3390/ma12132108
M3 - Article
AN - SCOPUS:85068881310
SN - 1996-1944
VL - 12
JO - Materials
JF - Materials
IS - 13
M1 - 2108
ER -