Energy states of Ge-doped SiO2 glass estimated through absorption and photoluminescence

Makoto Fujimaki, Yoshimichi Ohki, Hiroyuki Nishikawa

    Research output: Contribution to journalArticle

    42 Citations (Scopus)

    Abstract

    The energy states of oxygen-deficient type defects in the vacuum ultraviolet region are discussed based on the experimental results of vacuum ultraviolet absorption, temperature dependence of the photoluminescence (PL) intensities at 4.3 and 3.1 eV, and lifetimes of the PLs. It was found that the oxygen-deficient type glass has a large absorption tail above 6 eV in addition to an absorption band around 5 eV and that the 3.1 eV PL intensity scarcely depends on temperature when excited above 6 eV. It was also found that the lifetime of the 4.3 eV PL is 9 ns and that of the 3.1 eV PL is 113 μs irrespective of the excitation photon energy. The obtained results are explainable by assuming that electrons excited into the conduction band by photons above 6 eV contribute to the PLs.

    Original languageEnglish
    Pages (from-to)1042-1046
    Number of pages5
    JournalJournal of Applied Physics
    Volume81
    Issue number3
    Publication statusPublished - 1997 Feb 1

    Fingerprint

    photoluminescence
    glass
    life (durability)
    vacuum
    energy
    ultraviolet absorption
    photons
    oxygen
    conduction bands
    absorption spectra
    temperature dependence
    defects
    excitation
    electrons
    temperature

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Physics and Astronomy (miscellaneous)

    Cite this

    Energy states of Ge-doped SiO2 glass estimated through absorption and photoluminescence. / Fujimaki, Makoto; Ohki, Yoshimichi; Nishikawa, Hiroyuki.

    In: Journal of Applied Physics, Vol. 81, No. 3, 01.02.1997, p. 1042-1046.

    Research output: Contribution to journalArticle

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    abstract = "The energy states of oxygen-deficient type defects in the vacuum ultraviolet region are discussed based on the experimental results of vacuum ultraviolet absorption, temperature dependence of the photoluminescence (PL) intensities at 4.3 and 3.1 eV, and lifetimes of the PLs. It was found that the oxygen-deficient type glass has a large absorption tail above 6 eV in addition to an absorption band around 5 eV and that the 3.1 eV PL intensity scarcely depends on temperature when excited above 6 eV. It was also found that the lifetime of the 4.3 eV PL is 9 ns and that of the 3.1 eV PL is 113 μs irrespective of the excitation photon energy. The obtained results are explainable by assuming that electrons excited into the conduction band by photons above 6 eV contribute to the PLs.",
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