Title | Salisbury screen with lossy nonconducting materials: Way to increase spectral selectivity of absorption |
Publication Type | Journal Article |
Year of Publication | 2022 |
Authors | V.V. Medvedev, N.N. Novikova, E. Zoethout |
Journal | Thin Solid Films |
Volume | 751 |
Pagination | 139232 |
Date Published | 06/2022 |
Abstract | We present a modified Salisbury screen design in which the thin absorbing metal layer is replaced with a layer of nonconducting lossy material. The conditions for total absorption in such a structure are explained using a simplified analytical model and rigorous numerical calculations. For the proof-of-principle experiments, germanium/silicon bilayers deposited on aluminium substrates are designed and manufactured. The structures demonstrate nearly perfect absorption in the near-IR spectral range. Compared to conventional Salisbury screens, a lossy semiconductor top layer exhibits increased spectral selectivity of absorption. The wavelength of nearly perfect absorption remains tunable by optimizing the thicknesses of the lossy and transparent layers. |
DOI | 10.1016/j.tsf.2022.139232 |
Division | MaSF |
Department | SFFI |
PID | 65c052534a578abd893c5010c8ea976d |
Alternate Title | Thin Solid Films |
Label | OA |
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