Spectral dependences of the optical absorption in bismuth germanium oxide crystals annealed in vacuum

Abstract

Results of experimental investigations into the spectral dependences of the light absorption coefficient of an undoped Bi ₁₂GeO ₂₀ crystal annealed in vacuum at a temperature of 650°S and subsequently annealed in the air atmosphere at temperatures in the range T _AA = 315-590°S are presented for the spectral range 400-1100 nm at room temperature. It is established that the optical absorption of the crystal after temperature annealing in vacuum increases in the entire examined spectral range. Subsequent annealing in air leads to gradual restoration of the initial impurity absorption spectrum in the range from 530 to 1100 nm. The wide band that can be caused by oxygen vacancies is observed in the spectrum of absorption changes induced by annealing in vacuum.

Original language	English
Pages (from-to)	444-448
Number of pages	5
Journal	Russian Physics Journal
Volume	55
Issue number	4
DOIs	https://doi.org/10.1007/s11182-012-9831-4
Publication status	Published - 1 Sep 2012

Keywords

bismuth germanium oxide
impurity absorption
optical absorption
vacuum annealing

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1007/s11182-012-9831-4

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Kisteneva, M. G., Akrestina, A. S., Shandarov, S. M., Mandel, A. E., Grebenchukov, A. N., Pozdeeva, É. V., & Kargin, Y. F. (2012). Spectral dependences of the optical absorption in bismuth germanium oxide crystals annealed in vacuum. Russian Physics Journal, 55(4), 444-448. https://doi.org/10.1007/s11182-012-9831-4

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title = "Spectral dependences of the optical absorption in bismuth germanium oxide crystals annealed in vacuum",

abstract = "Results of experimental investigations into the spectral dependences of the light absorption coefficient of an undoped Bi 12GeO 20 crystal annealed in vacuum at a temperature of 650°S and subsequently annealed in the air atmosphere at temperatures in the range T AA = 315-590°S are presented for the spectral range 400-1100 nm at room temperature. It is established that the optical absorption of the crystal after temperature annealing in vacuum increases in the entire examined spectral range. Subsequent annealing in air leads to gradual restoration of the initial impurity absorption spectrum in the range from 530 to 1100 nm. The wide band that can be caused by oxygen vacancies is observed in the spectrum of absorption changes induced by annealing in vacuum.",

keywords = "bismuth germanium oxide, impurity absorption, optical absorption, vacuum annealing",

author = "Kisteneva, {M. G.} and Akrestina, {A. S.} and Shandarov, {S. M.} and Mandel, {A. E.} and Grebenchukov, {A. N.} and Pozdeeva, {{\'E} V.} and Kargin, {Yu F.}",

year = "2012",

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doi = "10.1007/s11182-012-9831-4",

language = "English",

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pages = "444--448",

journal = "Russian Physics Journal",

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TY - JOUR

T1 - Spectral dependences of the optical absorption in bismuth germanium oxide crystals annealed in vacuum

AU - Kisteneva, M. G.

AU - Akrestina, A. S.

AU - Shandarov, S. M.

AU - Mandel, A. E.

AU - Grebenchukov, A. N.

AU - Pozdeeva, É V.

AU - Kargin, Yu F.

PY - 2012/9/1

Y1 - 2012/9/1

N2 - Results of experimental investigations into the spectral dependences of the light absorption coefficient of an undoped Bi 12GeO 20 crystal annealed in vacuum at a temperature of 650°S and subsequently annealed in the air atmosphere at temperatures in the range T AA = 315-590°S are presented for the spectral range 400-1100 nm at room temperature. It is established that the optical absorption of the crystal after temperature annealing in vacuum increases in the entire examined spectral range. Subsequent annealing in air leads to gradual restoration of the initial impurity absorption spectrum in the range from 530 to 1100 nm. The wide band that can be caused by oxygen vacancies is observed in the spectrum of absorption changes induced by annealing in vacuum.

AB - Results of experimental investigations into the spectral dependences of the light absorption coefficient of an undoped Bi 12GeO 20 crystal annealed in vacuum at a temperature of 650°S and subsequently annealed in the air atmosphere at temperatures in the range T AA = 315-590°S are presented for the spectral range 400-1100 nm at room temperature. It is established that the optical absorption of the crystal after temperature annealing in vacuum increases in the entire examined spectral range. Subsequent annealing in air leads to gradual restoration of the initial impurity absorption spectrum in the range from 530 to 1100 nm. The wide band that can be caused by oxygen vacancies is observed in the spectrum of absorption changes induced by annealing in vacuum.

KW - bismuth germanium oxide

KW - impurity absorption

KW - optical absorption

KW - vacuum annealing

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