Investigation of optical homogeneity of langasite samples
In the work langasite (LGS, La3Ga5SiO14) samples of different crystallographic orientations and forms were investigated to determine connection between optical heterogeneity and growing conditions. On the plates with two polished sides the interference pictures in bulk (IPB) of crystal were fou...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2006
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/6a06827c9be144fea145d86df69023ce |
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| Sumario: | In the work langasite (LGS, La3Ga5SiO14) samples of different crystallographic
orientations and forms were investigated to determine connection between optical
heterogeneity and growing conditions. On the plates with two polished sides the interference
pictures in bulk (IPB) of crystal were found. The main reason of IPB is heterogeneity of
refractive indices. It was established by research of form of the plates’ surfaces and absorption
factor in various areas on a plate. The refractive index No and its dispersion were measured
by method of a prism in range of wave lengths from 400 up to 800 nm, total measuring
inaccuracy was less than 0,0001. It is possible to ascertain that heterogeneity of a refractive
index along a direction of growth is much higher than in a perpendicular direction. |
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