ZnO crystal as a potential damage-recoverable window material for fusion reactors

Kohei Yamanoi, Melvin John F. Empizo, Kazuyuki Mori, Keisuke Iwano, Yuki Minami, Ren Arita, Yuki Iwasa, Kazuhito Fukuda, Kosaku Kato, Keisuke Takano, Toshihiko Shimizu, Makoto Nakajima, Masashi Yoshimura, Nobuhiko Sarukura, Takayoshi Norimatsu, Masanori Hangyo, Hiroshi Azechi, Tsuguo Fukuda, Bess G. Singidas, Roland V. SarmagoMakoto Oya, Yoshio Ueda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Hydrothermal-grown bulk zinc oxide (ZnO) single crystals are investigated before and after 1-keV hydrogen-ion and deuterium-ion plasma irradiation. A decrease in optical transmittance, red-shifting of ultraviolet (UV) emission peaks, and shortening of UV emission lifetimes are observed from the bulk crystals immediately after irradiation. The results are attributed to the radiation-induced defects formed by hydrogen implantation. Although these defects immediately affect the optical properties of the single crystals, the optical transmittances and photoluminescence emissions recover days after irradiation. Our observations show the potential properties of a bulk ZnO single crystal as a damage-recoverable window material in high-flux-radiation environments such as those of fusion reactors.

Original languageEnglish
Pages (from-to)646-650
Number of pages5
JournalOptical Materials
Publication statusPublished - Dec 1 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Spectroscopy
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


Dive into the research topics of 'ZnO crystal as a potential damage-recoverable window material for fusion reactors'. Together they form a unique fingerprint.

Cite this