Gamma-ray irradiation effects on the optical properties of bulk ZnO single crystals

被引:9
|
作者
Empizo, Melvin John F. [1 ]
Yamanoi, Kohei [1 ]
Mori, Kazuyuki [1 ]
Arita, Ren [1 ]
Iwano, Keisuke [1 ]
Takabatake, Masahiro [1 ]
Fukuda, Kazuhito [1 ]
Hori, Tatsuhiro [1 ]
Minami, Yuki [1 ]
Luong, Mui Viet [1 ]
Abe, Yuki [1 ]
Kojima, Sadaoki [1 ]
Arikawa, Yasunobu [1 ]
Shimizu, Toshihiko [1 ]
Sarukura, Nobuhiko [1 ]
Norimatsu, Takayoshi [1 ]
Azechi, Hiroshi [1 ]
Salvador, Arnel A. [2 ]
Sarmago, Roland V. [2 ]
Fukuda, Tsuguo [3 ]
机构
[1] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
[2] Univ Philippines Diliman, Natl Inst Phys, Quezon City 1101, Philippines
[3] Fukuda Crystal Lab Co Ltd, Sendai, Miyagi 9893204, Japan
基金
日本科学技术振兴机构;
关键词
RADIATION; DAMAGE; PHOTOLUMINESCENCE; GAP;
D O I
10.7567/APEX.8.061101
中图分类号
O59 [应用物理学];
学科分类号
摘要
Hydrothermal-grown bulk ZnO single crystals are investigated before and after gamma-ray irradiation. The irradiation does not alter the optical transparency in the visible region. The gamma rays only induce modified near-band-edge UV emission with blue-shifted peaks and shortened response times. From the initial values before irradiation, the peaks shift by 5 to 6 nm, and the response times shorten by 140 to 440 ps. We attribute these observations to the radiation-induced defects on the bulk crystals. Our results nevertheless lead to the realization of short-wavelength ZnO scintillators that can be utilized in high-energy-radiation environments. (C) 2015 The Japan Society of Applied Physics
引用
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页数:4
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