Core region and optical properties of Er 3+ doped Y3Al5O12 single crystals (Er 3+ doped Y3Al5O12 단결정의 core 영역 및 광학적 특성)

Jang Bo Shim (심장보); 이영진; Jin Ki Kang (강진기); Young Kuk Lee (이영국)

doi:10.6111/JKCGCT.2015.25.3.111

Core region and optical properties of Er 3+ doped Y3Al5O12 single crystals

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2015, 25(3), pp.111~115
DOI : 10.6111/JKCGCT.2015.25.3.111
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering

Jang Bo Shim ¹, 이영진 ¹, Jin Ki Kang ², Young Kuk Lee ¹

¹한국화학연구원
²(주)엔티에스

Accredited

ABSTRACT

Er 3+ doped Y3Al5O12 (Er : YAG) single crystals, in which the concentrations of Er 3+ ion were 5, 7.3, 8, and 10 at.%, were grown by the Czochralski method under nitrogen atmosphere. The <111> oriented Er : YAG single crystals with diameters of up to 50 mm were grown at a pulling rate of 1.0 mm/h and rotation rate of 10 rpm. The thick part of the core region was generated mainly when there was a diameter change during the crystal growth. The concentrations of Er 3+ ion in the crystals were the same as it was in the melt. Er 3+ concentration of core region was slightly higher than the other regions in the compositional analysis. The fluorescence lifetime was saturated according to the increase of Er 3+ doping concentrations.

KEYWORDS

Er 3+ doped Y3Al5O12, Czochralski method, ICP-AES, Fluorescence lifetime

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