Work

Combining Infrared Refraction and Attenuated Total Reflection Spectroscopy

Year: 2024

Type: article

Abstract: We have specified and obtained a ZnSe prism with an unconventional face angle cut to 30°. This prism, with internal incidence angles ranging from 30° to 48°, allows users to record internal reflection spectra below the critical angle and attenuated total reflection (ATR) spectra above the critical angle without the need to change optics or move or replace the sample. We demonstrate its capabilities using 102 spectra of benzyl benzoate taken with s - and p -polarization at different angles of incidence. The subcritical spectra were analyzed to obtain n ∞ , a key parameter for correcting the ATR spectra. These corrected spectra were subsequently used to determine the complex refractive index for all ATR measurements. The averaged complex refractive index function shows excellent agreement with that obtained through ATR spectroscopic ellipsometry.

Source: Applied Spectroscopy

DOI: 10.1177/00037028241283050

Authors: Thomas G. Mayerhöfer, William D.P. Costa, Jürgen Popp

Institutions: Leibniz Institute of Photonic Technology, Friedrich Schiller University Jena

Language: English

Topic: Spectroscopy Techniques in Biomedical and Chemical Research

Subfield: Biophysics

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: green

Funders: Bundesministerium für Bildung und Forschung, Thüringer Aufbaubank, Thüringer Ministerium für Wirtschaft, Wissenschaft und Digitale Gesellschaft, Leibniz-Gemeinschaft

OpenAlex ID: W4403200427