ON THE QUANTUM EFFICIENCY OF CHROMIUM-DOPED GLASSES

George F Imbusch; T. J. Glynn

ON THE QUANTUM EFFICIENCY OF CHROMIUM-DOPED GLASSES

George F Imbusch
, T. J. Glynn

Physics

University of Galway

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

44 Citations (Scopus)

Abstract

It is argued that in chromium-doped glasses the environment about the chromium ion can undergo a much greater deformation, when the electronic state of the ion changes from ⁴A₂ to ⁴T₂, than is the case for most crystalline materials. An increased deformation enhances the probability for multiphonon relaxation. The case of Cr³⁺ ions in low field sites in oxide glasses is considered. The large deformation shows up as a large Stokes shift of the ⁴T₂ ↔ ⁴A₂ transitions, and it is argued that the enhanced multiphonon relaxation is responsible for the low quantum efficiency of broadband-emitting chromium-doped glasses.

Original language	English (Ireland)
Pages (from-to)	63-65
Number of pages	3
Journal	Journal Of Luminescence
Volume	45
Issue number	1-6
Publication status	Published - 1 Jan 1990

Authors (Note for portal: view the doc link for the full list of authors)

Authors
IMBUSCH, GF,GLYNN, TJ,MORGAN, GP

Cite this

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title = "ON THE QUANTUM EFFICIENCY OF CHROMIUM-DOPED GLASSES",

abstract = "It is argued that in chromium-doped glasses the environment about the chromium ion can undergo a much greater deformation, when the electronic state of the ion changes from 4A2 to 4T2, than is the case for most crystalline materials. An increased deformation enhances the probability for multiphonon relaxation. The case of Cr3+ ions in low field sites in oxide glasses is considered. The large deformation shows up as a large Stokes shift of the 4T2 ↔ 4A2 transitions, and it is argued that the enhanced multiphonon relaxation is responsible for the low quantum efficiency of broadband-emitting chromium-doped glasses.",

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N2 - It is argued that in chromium-doped glasses the environment about the chromium ion can undergo a much greater deformation, when the electronic state of the ion changes from 4A2 to 4T2, than is the case for most crystalline materials. An increased deformation enhances the probability for multiphonon relaxation. The case of Cr3+ ions in low field sites in oxide glasses is considered. The large deformation shows up as a large Stokes shift of the 4T2 ↔ 4A2 transitions, and it is argued that the enhanced multiphonon relaxation is responsible for the low quantum efficiency of broadband-emitting chromium-doped glasses.

AB - It is argued that in chromium-doped glasses the environment about the chromium ion can undergo a much greater deformation, when the electronic state of the ion changes from 4A2 to 4T2, than is the case for most crystalline materials. An increased deformation enhances the probability for multiphonon relaxation. The case of Cr3+ ions in low field sites in oxide glasses is considered. The large deformation shows up as a large Stokes shift of the 4T2 ↔ 4A2 transitions, and it is argued that the enhanced multiphonon relaxation is responsible for the low quantum efficiency of broadband-emitting chromium-doped glasses.

UR - https://www.scopus.com/pages/publications/0025232168

M3 - Article

VL - 45

SP - 63

EP - 65

JO - Journal Of Luminescence

JF - Journal Of Luminescence

IS - 1-6

ER -

ON THE QUANTUM EFFICIENCY OF CHROMIUM-DOPED GLASSES

Abstract

Authors (Note for portal: view the doc link for the full list of authors)

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