Birefringence induced by spatial dispersion in KI

The birefringence of a single crystal of KI due to spatial dispersion has been measured at room temperature between 4.3 and 5.2 eV. This birefringence shows strong dispersion near the lowest exciton ( ω 0 = 5.6 eV). By fitting these results with a microscopic model one obtains the warping parameter...

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Bibliographic Details
Published inSolid state communications Vol. 50; no. 4; pp. 371 - 373
Main Authors Meseguer, F., Cardona, M., Cintas, A.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.01.1984
Elsevier
Subjects
Birefringence (including stress birefringence, flow birefringence, etc.)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Physics
Birefringence
Exciton
Ultraviolet absorption
Experimental study
Single crystal
Inorganic compound
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Summary:The birefringence of a single crystal of KI due to spatial dispersion has been measured at room temperature between 4.3 and 5.2 eV. This birefringence shows strong dispersion near the lowest exciton ( ω 0 = 5.6 eV). By fitting these results with a microscopic model one obtains the warping parameter of the Λ 8 valence band, which is in reasonable agreement with theoretical estimates.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(84)90388-0