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

来源：

APPLIED PHYSICS EXPRESS | 2015年 / 8卷 / 06期

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

页数：4

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