English translation of the paper "Electromagnetic field inside a plane-parallel layer in the resonant absorption regime" (1962) by A. P. Khapalyuk: Pioneering study on coherent perfect absorption

TL;DR

This paper from 1962 by Khapalyuk is a pioneering early study on resonant light absorption in layered media, laying foundational ideas for what is now known as coherent perfect absorption (CPA).

Contribution

It is the first English translation of Khapalyuk's work, highlighting its historical significance and contextualizing it within modern CPA research.

Findings

Early identification of resonant absorption effects

Introduction of concepts related to perfect light absorption

Foundation for future CPA developments

Abstract

In 1962, Belarusian physicist A. P. Khapalyuk has published the paper [Doklady Akademii nauk BSSR, volume 6, issue 5, pages 301-304] devoted to the effect of resonant absorption of light in a layer of matter. This work can be considered as a first study of the phenomenon known today as coherent perfect absorption (CPA). Unfortunately, the paper by A. P. Khapalyuk was published in a local journal in Russian and is almost unknown to the English-language scientific community. Here, we give the first translation of this paper into English, accompany it with the introductory remarks including some biographical information on A. P. Khapalyuk and put it in the context of modern CPA studies.