Growth and Spectral Properties of Si4+ Co-Doped Yb:YAG Single Crystal

Abstract

Abstract: The single crystals of Yb³⁺-doped and Si⁴⁺ co-doped Y₃Al₅O₁₂ (YAG) were grown by the Czochralski method. Both crystals belong to the cubic system with the O_h¹⁰-Ia3d space group. The addition of Si⁴⁺ does not change their crystal structure, but changes the luminescent ions valent. The absorption spectrum manifests that the substitution of Al³⁺ by Si⁴⁺ leads to the transformation of Yb³⁺ to Yb²⁺ for the charge balance, and then reduces the luminous intensity of Yb:YAG. The X-ray and γ-ray excited luminescence (XEL) measurement shows that the luminous intensity of Si⁴⁺ co-doped Yb:YAG is about 63% and 40% of Yb:YAG, respectively. Additionally, because of the isotope of Yb, Yb:YAG can even be excited by neutrons with nuclear reaction, the charge particles cause secondary reactions to produce fluorescence. The fluorescence intensity is still determined by Yb³⁺, thus the sensitivity for neutron is also reduced by Si⁴⁺ co-doping.

Key words: Si⁴⁺ doping, Yb:YAG crystal, Czochralski method, scintillation property, detecting sensitivity

CLC Number:

O734

TIAN Ruifeng, ZHANG Lu, PAN Mingyan, QI Hongji. Growth and Spectral Properties of Si⁴⁺ Co-Doped Yb:YAG Single Crystal[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1957-1962.

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Growth and Spectral Properties of Si⁴⁺ Co-Doped Yb:YAG Single Crystal

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