Formation of optical centers in CVD diamond by electron and neutron irradiation

Y. Yokota*, H. Kotsuka, T. Sogi, J. S. Ma, A. Hiraki, H. Kawarada, K. Matsuda, M. Hatada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


An investigation of the formation of optical centers in chemical vapor deposited diamond (CVD diamond) by electron and neutron irradiation has been carried out. Cathodoluminescence was mainly used for observation of the optical centers. Several optical centers have been observed after the irradiation and subsequent annealing at 900°C, such as the 5RL center and the centers with zero-phonon lines at 3.19 eV, 2.16 eV and 1.94 eV. Because these centers are considered to have relations to nitrogen atoms, vacancies or interstitials, it is expected that their luminescence intensities depend on the amount of nitrogen doping and radiation dose. However, decrease in the luminescence intensity with the amount of nitrogen doping has been observed. Boron-doped specimens have also been irradiated and annealed, but the formation of defects related to boron has not been observed.

Original languageEnglish
Pages (from-to)470-477
Number of pages8
JournalDiamond and Related Materials
Issue number5-6
Publication statusPublished - 1992 Apr 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering


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