Red photoluminescence and optical absorption in hydrogen-treated GeO 2-SiO2 sol-gel-derived planar waveguides

K. D. Simmons, B. G. Potter, G. I. Stegeman

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We report the effects of post-deposition, reducing atmosphere heat treatment on the optical absorption, and photoluminescence response of 45 GeO2-55 SiO2 thin films produced using the sol-gel process. With increasing heat treatment, a linear increase in the 242 nm absorption peak (associated with oxygen-deficient germania centers) is found to contrast a reduction in the intensity of red photoluminescence (attributed to hydrogen centers in the glass structure). These results are discussed in terms of the photosensitive response of these materials.

Original languageEnglish (US)
Pages (from-to)2537-2539
Number of pages3
JournalApplied Physics Letters
Issue number19
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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