Open AccessA GENERAL TRANSFORMATION FORMULA FOR SHG COEFFI-C1ENTS OF A CRYSTAL AND THOSE OF ITS ANIONIC GROUPINGS
Author(s) -
Chuangtian Chen,
CHEN XIAO-SHEN
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.1000
Subject(s) - transformation (genetics) , crystal (programming language) , tensor (intrinsic definition) , series (stratigraphy) , materials science , work (physics) , basis (linear algebra) , nonlinear system , physics , thermodynamics , quantum mechanics , chemistry , mathematics , computer science , pure mathematics , geometry , geology , paleontology , biochemistry , gene , programming language
By using the irreducible tensor method of representing SHG coefficients, we have proposed in this paper a general transformation formula for SHG coefficients of the macroscopic crystal and those of its microscopic anionic groupings. It thus leads to a series of calculation formulas suitable generally for calculating the contributions of the anionic groupings of different orientations in the crystal to the macroscopic SHG coefficients. It has been shown that this method can be used conveniently to calculate the SHG coefficients of various iodates. The agreements of our calculation values with the experimental ones are quite satisfactory. Our work has provided a dear stero-structural criterion for searching of new types of SHG materials.