Temperature and incident beam-current dependence of dominant free-exciton recombination radiation from high-purity chemical vapor deposition (CVD) diamonds

Akira Yamaguchi, Satoshi Yamashita, Takahiro Tsutsumi, Hiroshi Kawarada

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Dominant free-exciton (FE) recombination radiation has been obtained from high-purity Chemical vapor deposition (CVD) diamond synthesized on Cu substrates by means of microwave plasma CVD using CH4 + O2 diluted with H2. The intensity of FE emission is almost constant between 80 K and 170 K, and is reduced by two orders of magnitude at room temperature. The emission increases in proportion to the incident beam current from 1 × 10–9 A to 2 × 10–6 A. The spectrum shapes between 200 nm and 600 nm do not depend on the beam current. In addition, the isotopic effect on the FE emission peak shift has been observed in the spectrum from13C-enriched (96.6%) CVD diamond for the first time.

Original languageEnglish
Pages (from-to)L1063-L1065
JournalJapanese journal of applied physics
Volume33
Issue number8
DOIs
Publication statusPublished - 1994 Aug

Keywords

  • C-enriched CVD diamond
  • Free-exciton recombination radiation
  • UV-light-emitting

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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