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Title: Enhanced 1.53 μm emission of Er{sup 3+} ions in phosphate glass via energy transfer from Cu{sup +} ions

Optimizing the efficiency of Er{sup 3+} emission in the near-infrared telecommunication window in glass matrices is currently a subject of great interest in photonics research. In this work, Cu{sup +} ions are shown to be successfully stabilized at a high concentration in Er-containing phosphate glass by a single-step melt-quench method, and demonstrated to transfer energy to Er{sup 3+} thereby enhancing the near-infrared emission about 15 times. The spectroscopic data indicate an energy conversion process where Cu{sup +} ions first absorb photons broadly around 360 nm and subsequently transfer energy from the Stokes-shifted emitting states to resonant Er{sup 3+} absorption transitions in the visible. Consequently, the Er{sup 3+} electronic excited states decay and the {sup 4}I{sub 3/2} metastable state is populated, leading to the enhanced emission at 1.53 μm. Monovalent copper ions are thus recognized as sensitizers of Er{sup 3+} ions, suggesting the potential of Cu{sup +} co-doping for applications in the telecommunications, solar cells, and solid-state lasing realizable under broad band near-ultraviolet optical pumping.
Authors:
 [1] ;  [2]
  1. Department of Chemistry, University of North Florida, Jacksonville, Florida 32224 (United States)
  2. Optical Spectroscopy and Nano-Materials Lab, New College of Florida, Sarasota, Florida 34243 (United States)
Publication Date:
OSTI Identifier:
22308467
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; COPPER IONS; CURRENTS; DECAY; EMISSION; ENERGY CONVERSION; ENERGY TRANSFER; ERBIUM IONS; METASTABLE STATES; NEAR INFRARED RADIATION; OPTICAL PUMPING; OPTIMIZATION; PHOSPHATE GLASS; PHOTONS; SOLAR CELLS; SOLIDS; ULTRAVIOLET RADIATION