Laser diode induced white light emission of gamma-Al2O3 nano-powders

Bilir G., Liguori J.

JOURNAL OF LUMINESCENCE, vol.153, pp.350-355, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 153
  • Publication Date: 2014
  • Doi Number: 10.1016/j.jlumin.2014.03.065
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.350-355
  • Istanbul Technical University Affiliated: Yes


A broadband white light emission was observed ranging from 450 to 900 nm from nominally un-doped gamma-Al2O3 nano-powders under 803.5 nm and 975 nm laser diode excitations. The white light emission has a strong dependence on both the environment pressure and the pumping laser power. We spectroscopically characterized this white light emission in a systematic way by collecting spectra, measuring decay- and rise patterns and changing parameters such as pumping power, pumping wavelength, environment temperature and pressure. (C) 2014 Elsevier B.V. All rights reserved.