Light figure spectroscopy of optically active anisotropic materials

• Published in: The Journal of physics and chemistry of solids Vol. 64; no. 9; pp. 1959 - 1962
• Main Authors: Yamamoto, Nobuyuki, Mamedov, Nazim, Shim, Yonggu, Hidaka, Chiharu, Takizawa, Takeo, Niwa, Eiji, Masumoto, Katashi
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01-09-2003; Elsevier
• Subjects: A. Inorganic compounds; A. Optical materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; D. Crystal structure; D. Dielectric properties; D. Optical properties; Exact sciences and technology; Optical activity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optical rotatory power; Physics; D. Dielectric properties; A. Inorganic compounds; A. Optical materials; D. Optical properties; D. Crystal structure; Temperature dependence; Gallium sulfides; Inorganic compounds; Silver sulfides; Ternary compounds; Transition element compounds; Calcium carbonates; Interference; Binary compounds; D. Crystal structure: D. Dielectric properties; Experimental study; Tellurium oxides; Optical anisotropy; Optical activity; Optical materials; Incidence angle; Crystal structure
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/S0022-3697(03)00203-8

Low order interference curves in optic-axis light figures of the optically active AgGaS
2 and TeO
2 are investigated in the visible spectral range at room temperature. Light figure patterns of AgGaS
2 are found not to be affected by optical activity within the incidence angles of 10° for which, according to our symmetry considerations, the normal component of gyration tensor is small and evolution of light figures with wavelength is overwhelmingly determined by optical anisotropy. The absolute value of this anisotropy is falling down to null when passing through the isotropic point, with the result of a remarkable change of the parameters of light figure patterns. Unlike the case of AgGaS
2 and consistently with our symmetry considerations, light figures of TeO
2 are influenced by optical activity especially strongly in low orders of interference. The obtained results are compared with similar results for optically inactive CaCO
3 and discussed in the frameworks of our recent analyses.