Anomalous temperature dependence of near‐infrared photoluminescence band in neutron‐irradiated α‐Al2O3. Issue 7 (26th March 2014)

• Record Type: Journal Article
• Authors: Rahman, Abu Zayed Mohammad Saliqur; Wei, Long; Yang, Tao; Xu, Qiu; Atobe, Kozo
• Is Part Of: Physica status solidi. Volume 211:Issue 7(2014:Jul.)
• Page Start: 1535
• Page End: 1538
• Publication Date: 2014-03-26
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201330660
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201330660-sec-0001" sec-type="section"> <p>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. <inline-graphic xlink:href="ark:/27927/pghqcgq7q5" content-type="pssa201330660-gra-0001" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </sec> </abstract>