Total absorption conditions for Salisbury-screen interference coatings

T.M. Linkova^a, V.V. Medvedev^†^b
^aMoscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141700, Russian Federation
^bInstitute of Spectroscopy, Russian Academy of Sciences, ul. Fizicheskaya 5, Troitsk, Moscow, 108840, Russian Federation

Interference light-absorbing coatings are examined using the Salisbury screen structure. Reflection and absorption coefficients both in energy and amplitude form are obtained from the solution of the wave equation. Clear analytical conditions for total absorption at normal wave incidence are derived. A numerical analysis of perfect absorption conditions is performed. Examples of thin-film coating design using the spectral dependences of optical constants of real materials are presented. Cr/ZnSe/Al structure is used to demonstrate achieving perfect absorption using real materials.

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Keywords: interference coatings, light-absorbing structures, absorption, Salisbury screen
PACS: 42.25.Bs, 42.79.−e, 78.67.−n (all)
DOI: 10.3367/UFNe.2026.04.040125
URL: https://ufn.ru/en/articles/2026/8/d/
Citation: Linkova T M, Medvedev V V "Total absorption conditions for Salisbury-screen interference coatings" Phys. Usp. 69 (8) (2026)

Received: 11th, February 2026, revised: 10th, April 2026, accepted: 20th, April 2026

Оригинал: Линкова Т М, Медведев В В «Условия полного поглощения в интерференционных покрытиях типа экран Солсбери» УФН 196 867–875 (2026); DOI: 10.3367/UFNr.2026.04.040125

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