| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | Growth and Optical Properties of Rare-earth Doped Y3Al5O12 Single Crystals Grown by the Czochralski Method |
| 초록 | Yttrium aluminum garnet (Y3Al5O12) has good thermal stability, excellent optical and mechanical properties which make it very suitable for host matrix material. Trivalent rare-earth doped Y3Al5O12 are important photonic materials with a wide range of applications as active laser materials, phosphors and scintillators1,2. Y3Al5O12 (YAG) single crystals doped with rare-earth ions (Er3+ and Yb3+) were successfully grown by the Czochralski method. Using the pulling rate of 0.8-1.2 mm/h and the rotation rate of 10-15 rpm, single crystals with diameters of up to 75 mm and lengths up to 200 mm were obtained. To investigate the etch pit density, RE:YAG (RE=Er, Yb) crystals were etched in liquid H3PO4 at 260 ℃ for 1 hour. Etch pits of dislocations were observed under the optical microscope. The concentrations of Er3+ and Yb3+ ions in the crystals determined by inductively coupled plasma atomic emission spectrometry according to the solidified fraction. We measured the absorption, emission, and fluorescence lifetime to investigate the optical properties of RE:YAG single crystals. REFERENCES 1. A. A. Kaminskii, in Laser Crystals, edited by H. F. Ivey (Springer, New York, 1981). 2. M. A. Dubinskii, K. L. Schepler, V. V. Semashko, R. Yu. Abdulsabirov, S. L. Korableva, A. K. Naumov, J. Mod. Opt. 45, 221 (1998). |
| 저자 | Jang Bo Shim, Young Kuk Lee |
| 소속 | Korea Research Institute of Chemical Technology |
| 키워드 | Yttrium aluminum garnet (Y<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB>); Etch pit density; Fluorescence lifetime |
