Anomalous temperature dependence of near-infrared photoluminescence band in neutron-irradiated α-Al2O3

Anomalous temperature dependence of near-infrared photoluminescence band in neutron-irradiated α-Al2O3

The properties of near‐infrared (NIR) photoluminescence (PL) spectra in a range of 0.8–2.8 μm in fast neutron‐irradiated α‐Al2O3 are reported. Anomalous temperature dependence of NIR PL spectra was observed in neutron‐irradiated α‐Al2O3 for the first time. Highest PL intensity was measured at 260 K...

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Veröffentlicht in:Physica status solidi. A, Applications and materials science Applications and materials science, 2014-07, Vol.211 (7), p.1535-1538
Hauptverfasser: Rahman, Abu Zayed Mohammad Saliqur, Wei, Long, Yang, Tao, Xu, Qiu, Atobe, Kozo
Format: Artikel
Sprache:eng
Schlagworte:
alumina
color centers
neutron irradiation
photoluminescence
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Zusammenfassung:The properties of near‐infrared (NIR) photoluminescence (PL) spectra in a range of 0.8–2.8 μm in fast neutron‐irradiated α‐Al2O3 are reported. Anomalous temperature dependence of NIR PL spectra was observed in neutron‐irradiated α‐Al2O3 for the first time. Highest PL intensity was measured at 260 K whereas the intensity at low temperatures below 220 K decreased significantly. Phonon‐assisted indirect radiative recombination may be responsible for PL intensity enhancement at near room temperature. NIR PL band in a range of 0.8–2.8 μm may be well suited for application in broadly tunable color‐center laser because of its enhanced PL intensity at near room temperature.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201330660