The concentration dependence of luminescence of Nd:Y3Al5O12 nanoceramics

Abstract: Transparent Nd:YAG ceramics composed of nanosized grains were fabricated by the low temperature high pressure (LTHP) sintering technique. The effect of concentration of ions on luminescence properties of Nd3+ doped YAG nanoceramics and nanopowders was investigated. It was found that at room temperature the intensity ratio of 4F3/2 → 4I9/2 and 4F3/2 → 4I11/2 transitions in nanoceramics was strongly dependent on concentration of Nd3+. This behavior was not observed for the Nd:YAG nanopowders. The nature of such behavior was briefly discussed in terms of lowering the site symmetry of Nd3+ ions with applied pressure. [Copyright &y& Elsevier]