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Reflection of waves by imperfectly periodic layered media
Author(s) -
Hashimoto Masahiro
Publication year - 1980
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs015i005p00939
Subject(s) - grating , reflection (computer programming) , numerical analysis , optics , invariant (physics) , wavenumber , mathematical analysis , mathematics , physics , computer science , programming language , mathematical physics
In order to facilitate the numerical evaluation of the grating effects of imperfectly periodic layered media, we introduce the extended local wave number concept, and we describe how the reflected wave is determined from the spatial behavior of the extended local wave number. A numerical method based on this concept is presented, which proves to be useful for structures with more than ten layers with the nonuniform period. Numerical comparisons with the invariant imbedding approach show the validity and utility of the method. Two specific structures are analyzed using this method.