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Boundary Conditions in Case of Electromagnetic Wave Absorption
Author(s) -
Kudykina T. A.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221600136
Subject(s) - electromagnetic radiation , absorption (acoustics) , physics , refraction , electric field , poynting vector , amplitude , boundary value problem , excited state , optics , atomic physics , magnetic field , quantum mechanics
Boundary conditions for electromagnetic waves in absorbing media are obtained. The fact is taken into account, that in absorbing media the electric induction has two components: one in phase with the electric field of the incident wave and the other – out of phase by π/2. The Maxwell boundary conditions for each component gives equations enough to determine the amplitudes of all excited waves in the range of exciton resonance and of all waves, charge, and current densities in the band‐to‐band excitation range. For TM‐waves the analogue of Snellius' law is obtained in the case of absorbing media. TE‐waves Snellius' refraction law is valid in case of absorbing media too. In both the cases the reflectivity depends upon absorption and in the limit of great absorption (χ → n , where n , χ are the indexes of refraction and absorption, respectively) tends to unity.