Investigation of the Gyrotropy in the Spectral Region of the Absorption "Shoulder" of the Oxide Crystal Bi12SiO20

Authors

  • Todor Dimov Faculty of Natural Sciences, University of Shumen
  • Iliya Iliev Faculty of Natural Sciences, University of Shumen
  • Antonina D. Hristova Faculty of Engineering, N. Y. Vaptsarov Naval Academy

DOI:

https://doi.org/10.7546/CRABS.2022.04.05

Keywords:

Faraday effect, optical activity in semiconductors, impurities in solid, absorption edges, absorption spectra of solid

Abstract

This paper presents the research of the gyrotropy of a pure Bi$$_{12}$$SiO$$_{20}$$ (BSO) and doped Bi$$_{12}$$SiO$$_{20}$$:Al (BSO:Al) crystals in the spectral region of "absorption shoulder" using measurements of the spectra of the natural optical rotation, the magneto-optical rotation and the optical spectroscopy. It is shown that the difference in the absorption of the BSO and BSO:Al crystals is related to the presence of two types of defects in the crystals BSO:Al – impurities $$\rm Al_{Si}^{3+}$$ in $$\rm[Al_{Si}^{3+}O_4]$$ and $$\rm Bi_{Si}^{3+}$$ in $$\rm[Bi_{Si}^{3+}O_4]$$. A "red-shift" of the optical rotation spectrum of BSO:Al crystals has also been observed relative to the optical rotation spectrum of BSO crystals.

Author Biographies

Todor Dimov, Faculty of Natural Sciences, University of Shumen

Mailing Address:
Faculty of Natural Sciences,
University of Shumen
115 Universitetska St
9700 Shumen, Bulgaria

E-mail: dimov.todor@abv.bg

Iliya Iliev, Faculty of Natural Sciences, University of Shumen

Mailing Address:
Faculty of Natural Sciences,
University of Shumen
115 Universitetska St
9700 Shumen, Bulgaria

E-mail: illijanov_43@abv.bg

Antonina D. Hristova, Faculty of Engineering, N. Y. Vaptsarov Naval Academy

Mailing Address:
Faculty of Engineering,
N. Y. Vaptsarov Naval Academy
73 V. Drumev St
9026 Varna, Bulgaria

E-mail: antonina05@abv.bg

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Published

02-05-2022

How to Cite

[1]
T. Dimov, I. Iliev, and A. Hristova, “Investigation of the Gyrotropy in the Spectral Region of the Absorption ‘Shoulder’ of the Oxide Crystal Bi12SiO20”, C. R. Acad. Bulg. Sci. , vol. 75, no. 4, pp. 510–518, May 2022.

Issue

Section

Physics