Structural origin of the 5.16-EV optical-absorption band in silica and GE-doped silica

Files

TR Number

Date

1994-03-01

Journal Title

Journal ISSN

Volume Title

Publisher

AIP Publishing

Abstract

The origin of the 5.16 eV absorption band observed in silica and Ge-doped silica was studied using optical and electron spin resonance (ESR) measurements. The band was observed only in samples containing Ge, suggesting that it is related to the Ge impurity in silica, while a lack of correlation between the ESR intensity of the induced hydrogen-associated doublet and the absorption coefficient of the 5.16 eV band indicates that it is not related to two-coordinated Si or Ge. The observation of the absorption coefficient increased as the square root of the Ge concentration demonstrates that the 5.16 eV band is not related to two-coordinated Ge defects but that it is an oxygen deficiency center of the divacancy type associated with Ge.

Description

Keywords

Oxygen-deficient centers, Twofold coordinated si, Glassy SiO2, Defects, Luminescence, Vacancy, Atoms

Citation

Tsai, TE; Friebele, EJ; Rajaram, M; et al., "Structural origin of the 5.16-EV optical-absorption band in silica and GE-doped silica," Appl. Phys. Lett. 64, 1481 (1994); http://dx.doi.org/10.1063/1.111891