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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 3 — Jul. 1, 2011
  • pp: 400–412

On the natures of radiation-induced point defects in GeO2-SiO2 glasses: reevaluation of a 26-year-old ESR and optical data set

David L. Griscom  »View Author Affiliations

Optical Materials Express, Vol. 1, Issue 3, pp. 400-412 (2011)

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26-year-old electron spin resonance (ESR) and optical data pertaining to isochronal annealing studies of x-ray induced defect centers in a GeO2-SiO2 glass are revisited here with the object of extracting new insights regarding the fundamental natures of these defects. It is concluded that (i) the paramagnetic Ge(1) and Ge(2) centers are two energetically inequivalent configurations of a single trapped-electron defect, in analogy to what is known to be the case for the Ge(II) and Ge(I) centers respectively in α quartz [Isoya et al., J. Chem. Phys. 69, 4876 (1978)], and (ii) the germanium lone pair center (GLPC) stably traps holes only in pairs and hence remains ESR silent.

© 2011 OSA

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(160.2220) Materials : Defect-center materials
(160.2750) Materials : Glass and other amorphous materials
(300.6370) Spectroscopy : Spectroscopy, microwave
(300.6540) Spectroscopy : Spectroscopy, ultraviolet
(350.5610) Other areas of optics : Radiation

ToC Category:
Glass and Other Amorphous Materials

Original Manuscript: April 6, 2011
Revised Manuscript: May 15, 2011
Manuscript Accepted: May 16, 2011
Published: June 16, 2011

Virtual Issues
Advances in Optical Materials (2011) Optical Materials Express

David L. Griscom, "On the natures of radiation-induced point defects in GeO2-SiO2 glasses: reevaluation of a 26-year-old ESR and optical data set," Opt. Mater. Express 1, 400-412 (2011)

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  1. E. J. Friebele and D. L. Griscom, “Color centers in glass optical fiber waveguides,” in Defects in Glasses - MRS Vol. 61, F.J. Galeener, D.L. Griscom, M.J. Weber, Eds. (Materials Research Society, Pittsburgh, Pa, 1986), pp. 319–331.
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  24. J. Nishii, K. Kintaka, H. Hosono, H. Kawazoe, M. Kato, and K.- Muta, “Pair generation of Ge electron centers and self-trapped hole centers in GeO2-SiO2 glasses by KrF excimer-laser irradiation,” Phys. Rev. B 60(10), 7166–7169 (1999). [CrossRef]
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