Salisbury screen with lossy nonconducting materials: Way to increase spectral selectivity of absorption

TitleSalisbury screen with lossy nonconducting materials: Way to increase spectral selectivity of absorption
Publication TypeJournal Article
Year of Publication2022
AuthorsV.V. Medvedev, N.N. Novikova, E. Zoethout
JournalThin Solid Films
Volume751
Pagination139232
Date Published06/2022
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.

DOI10.1016/j.tsf.2022.139232
Division

MaSF

Department

SFFI

PID65c052534a578abd893c5010c8ea976d
Alternate TitleThin Solid Films
LabelOA
Attachment: 

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