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Journal of Applied Spectroscopy

Reflection of electromagnetic waves from interface with amplifying medium

B. B. Boǐko, N. S. Petrov, И. З. Джилавдари

Published Apr 1, 1973• 1 citation
Publisher
DOI
10.1007/bf00604519

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We analyse in detail the necessary conditions to obtain amplified reflection (AR) in isotropic interfaces when a plane wave propagates from a transparent medium towards an active one. First, we demonstrate analytically that AR is not possible if a single interface is involved. Then, we study the conditions for AR in a very simple configuration: normal incidence on an active slab immersed in transparent media. Finally, we develop an analysis in the complex plane in order to establish a geometrical method that not only describes the behaviour of active slabs but also helps to simplify the calculus.