Near-Infrared Emission in Na5Y(WO4)4:Nd3+
Ashvini Pusdekar, Nilesh S. Ugemuge, Renuka Nafdey, S. V. Moharil
Abstract
Abstract Luminescence in Na5Y(WO4)4:Nd3+ is investigated for the first time. The emission is in the near-infrared region. The well known 4F3/2 → 4I9/2 transition leads to most intense line at 1069 nm. The excitation and emission spectra are interpreted using the energy level diagram of Nd3+. The excitation spectrum is made up of a large number of sharp lines attributable to various f–f transitions. A weak band at 360 nm in the ex-citation spectrum is assigned to the host. Notwithstanding large Y–Y distances, the luminescence is quenched at concentrations exceeding 2 mol %. The critical distance for energy transfer among Nd3+ ions is found to be 32.85 Å.
Topics & Concepts
Materials scienceInfraredEmission spectrumSolid-state physicsOpticsAstronomyPhysicsCondensed matter physicsSpectral lineLuminescence Properties of Advanced MaterialsSolid State Laser TechnologiesGlass properties and applications