Dominant free-exciton recombination radiation in chemical vapor deposited diamonds

Hiroshi Kawarada; Takahiro Tsutsumi; Hiroki Hirayama; Akira Yamaguchi

doi:10.1063/1.111126

Dominant free-exciton recombination radiation in chemical vapor deposited diamonds

Hiroshi Kawarada, Takahiro Tsutsumi, Hiroki Hirayama, Akira Yamaguchi

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

Dominant free-exciton recombination radiation has been obtained from chemical vapor deposited diamonds. The crystals are formed in a microwave plasma using the mixtures CO and CO₂ diluted with hydrogen. The concentration of CO₂ and the position of the samples in the plasma affect the crystallinity of the samples. The peak emission intensity ratio between the free-exciton recombination radiation and the band A emission is more than 20 in the samples formed at the edge of discharging area and with the optimum concentration of CO₂. The value is the highest ever reported in diamond.

Original language	English
Pages (from-to)	451-453
Number of pages	3
Journal	Applied Physics Letters
Volume	64
Issue number	4
DOIs	https://doi.org/10.1063/1.111126
Publication status	Published - 1994 Dec 1

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AU - Tsutsumi, Takahiro

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AU - Yamaguchi, Akira

PY - 1994/12/1

Y1 - 1994/12/1

N2 - Dominant free-exciton recombination radiation has been obtained from chemical vapor deposited diamonds. The crystals are formed in a microwave plasma using the mixtures CO and CO2 diluted with hydrogen. The concentration of CO2 and the position of the samples in the plasma affect the crystallinity of the samples. The peak emission intensity ratio between the free-exciton recombination radiation and the band A emission is more than 20 in the samples formed at the edge of discharging area and with the optimum concentration of CO2. The value is the highest ever reported in diamond.

AB - Dominant free-exciton recombination radiation has been obtained from chemical vapor deposited diamonds. The crystals are formed in a microwave plasma using the mixtures CO and CO2 diluted with hydrogen. The concentration of CO2 and the position of the samples in the plasma affect the crystallinity of the samples. The peak emission intensity ratio between the free-exciton recombination radiation and the band A emission is more than 20 in the samples formed at the edge of discharging area and with the optimum concentration of CO2. The value is the highest ever reported in diamond.

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