The Kramers–Kronig (K-K) relationship is an analytical method for the investigation of
the optical properties, dielectric function, and electron loss function (ELF) of materials.
This method is more applicable for analysis of the important role of the material
characteristic such as for solar cells, laser hosts, catalysts, and microwave absorption.
The researcher interest in this field has increased after the development of material
optical systems. In this proposal, the focus is on creating a research map using
standardised analysis methods by employing metadata from publication sources that
reveal the K-K relationships for specific field implementations. As a result of the
analysis of its application development, K-K has been commonly applied to field of
ELF, optical phonon vibrations, and dielectric function, representing a strategy that
facilitates quantitative analysis. Based on the investigation, the most influential author
(Martin Green), institutional affiliation (ARC Photovoltaics Centre of Excellence,
University of New South Wales) associated with the most prolific researcher, and the
country (United States) that contributed most to the K-K research were identified.