6533b834fe1ef96bd129d557
RESEARCH PRODUCT
The landscape of the excitation profiles of the αE and β emission bands in silica
Marco CannasFranco Mario GelardiMaurizio LeoneRoberto Boscainosubject
PhotoluminescenceChemistryAnalytical chemistryE bandOxygen deficiencyCondensed Matter PhysicsCrystallographic defectMolecular physicsSpectral lineElectronic Optical and Magnetic MaterialsAbsorption bandMaterials ChemistryCeramics and CompositesExcitationdescription
Abstract We report data about the relevance of the conformational heterogeneity in determining the optical properties of oxygen deficiency point defects in natural silica samples. The spectral profiles of the photoluminescence emissions at about 4.2 eV (α E band) and at about 3.15 eV (β band), and the efficiency of the intersystem-crossing mechanism connecting them appear modified by a fine tuning of the excitation energy within the B 2β absorption band. Moreover, the relative excitation optically spectra indicate the presence of optically distinguishable contributions to the emission profile. The reported data are attributed to a distribution of centers that maps into a spectral inhomogeneous broadening.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-04-01 | Journal of Non-Crystalline Solids |