Angular invariance of the contribution of an anisotropic thin surface layer to reflectance and reflectance-absorbance

ALEXANDER MICHAILOV, ALEXEY POVOLOTSKIY, VLADIMIR KUZMIN

Research outputpeer-review

Abstract

The absorbance studies of the optical radiation reflection from the boundary of two soft-matter media with a thin monolayer between are performed for a number of angles of incidence. The reflectance and absorbance spectra are described in terms of a unique spectrum invariant with respect to the incidence angles. The angular dependence of the absorbance for spolarized radiation is shown to not provide any extra information as compared with a single-angle study in line with the previously developed theoretical considerations. We verify it experimentally performing the multi-angle infrared reflection-absorption spectroscopy measurements at the air-water interface with a thin lipid film.

Original languageEnglish
Pages (from-to)3090-3096
JournalOptics Express
Volume29
Issue number3
DOIs
Publication statusPublished - 1 Feb 2021

Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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