Optical absorption in Bi2TeO5 single crystals

L. Ja. Sadovskaya; K. V. Agarkov; A. Yu. Kudzin; G. Kh. Sokolyanskii; V. V. Eliseyev

doi:10.1117/12.239218

29 April 1996 Optical absorption in Bi₂TeO₅ single crystals

L. Ja. Sadovskaya, K. V. Agarkov, A. Yu. Kudzin, G. Kh. Sokolyanskii, V. V. Eliseyev

Proceedings Volume 2795, Nonlinear Optics of Liquid and Photorefractive Crystals; (1996) https://doi.org/10.1117/12.239218
Event: Nonlinear Optics of Liquid and Photorefractive Crystals, 1995, Ai-Danil, Crimea, Ukraine

Abstract

Spectral dependences of optical absorption coefficient of the bismuth tellurite single crystals grown by Chohralsky method have been observed. The investigations were carried out on the fresh-prepared samples of the different thickness after annealing up to 400 degrees Celsius in the air and in the vacuum and also after illumination by the intensive light with various wavelengths. The value of the forbidden band for indirect transition (E_gi) is approximately 3.11 eV at room temperature and it decreases with the coefficient about 10^-3eV multiplied by K^-1. On the absorption spectra of the fresh-prepared sample the broad bands were observed in the region of fundamental edge and in the longwave region (hv equals 1.5 - 1.9 eV). Photochromic effect was found in the Bi₂TeO₅. The nature of optical absorption bands and photochromic effect is analyzed.

Citation Download Citation

L. Ja. Sadovskaya, K. V. Agarkov, A. Yu. Kudzin, G. Kh. Sokolyanskii, and V. V. Eliseyev "Optical absorption in Bi₂TeO₅ single crystals", Proc. SPIE 2795, Nonlinear Optics of Liquid and Photorefractive Crystals, (29 April 1996); https://doi.org/10.1117/12.239218

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