Multi-channel transition emissions of Sm3+ in lithium yttrium aluminum silicate glasses and derived opalescent glass ceramics

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Pages (from-to)265-272
Journal / PublicationJournal of Alloys and Compounds
Volume582
Online published15 Aug 2013
Publication statusPublished - 5 Jan 2014

Abstract

Sm3+-doped lithium-yttrium-aluminum-silicate (LYAS) glasses have been fabricated and effective visible and near-infrared (NIR) emissions are exhibited. The predicated spontaneous emission probabilities (Arad) are derived to be 29.1, 149.2, 150.1 and 39.0s-1 for conventional visible emissions assigned to 4G5/26H J (J = 5/2, 7/2, 9/2 and 11/2) transitions, and Arad are obtained to be 24.8, 4.6 and 2.7s-1 for the optical transitions 4G5/26FJ (J = 5/2, 7/2 and 9/2) corresponding to the NIR emissions, respectively. The maximum stimulated emission cross-sections (rem) are obtained to be 7.45 × 10 and 0.48 10-22 cm2 for visible (4G5/26H9/2) and NIR (4G5/26F9/2) emissions, respectively. Internal quantum efficiency for the 4G5/2 level and external quantum yield for visible emissions of Sm3+ are determined to be 44.9% and 11.58%, respectively. High temperature heat treatment testing was carried out on the LYAS glasses and orientational crystallization was observed. Visible transition emissions of Sm3+ with obvious Stark splitting indicate Sm3+ ions have been introduced into the YAG micro-crystal formed in the glass ceramics. Investigations on multi-channel radiative transition emissions of Sm 3+ in LYAS glasses provide a new clue to develop tunable lasers, compact light sources and optoelectronic devices. © 2013 Elsevier B.V. All rights reserved.

Research Area(s)

  • External quantum yield, Orientational crystallization, Radiative parameters, Samarium ions

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