Interference-Enhanced Absorption of Visible and Near-Infrared Radiation in Ultrathin Film Coatings

Медведев, В. В.; Gubarev, V.; Zoethout, E.; Новикова, Н. Н.

doi:10.1109/lpt.2021.3102149

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…To generate an effective (> 99 %) light absorption, the interference effect needs to be combined with a well-defined absorption of the layers [7,8]. Hereby, sub-stoichiometric dielectric layers or thin semitransparent metals can act as the light absorbing part [9,10]. Different coating designs with thin, transparent metal layers were already calculated and deposited by research groups [11,12].…”

Section: Introductionmentioning

confidence: 99%

Thin film black coatings based on interference and absorption

Munzert,

Schwinde,

Leitel

et al. 2024

Advances in Optical Thin Films VIII

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Light-absorbing black coatings are indispensable for many different optical applications. Thin-film interference coatings can be flexibly adapted to different wavelengths. To generate an effective (> 99 %) light absorption of an interference coating, the interference effect needs to be combined with a well-defined absorption of the layer's material. On this basis, different black absorber coatings were developed and deposited on optical components for actual applications. A wideband black absorber for 400 -1000 nm wavelength on a space spectrometer slit, a bi-directional black coating for a single wavelength in the VIS, which can be wet-chemically etched for micro-patterning, and a black aperture for NIR and SWIR light on the exit face of a dispersion prism are presented.

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