In this paper, excitonic properties of crystalline and glassy SiO 2 are reviewed. Experimental
spectroscopic data (optical absorption and reflection spectra, as well as spectra of …

In this paper, the electronic properties of localized states in wide-gap oxide glasses such as
sodium silicate, sodium germanate, lead silicate, silica and germania are reviewed …

The three dominant cathodoluminescence bands in amorphous SiO2 with maxima at 1.9,
2.7, and 4.3 cV are identical to bands seen in photoluminescence (PL) spectra of irradiated …

We consider a new type of nonradiative transitions in nonmetallic solids. The transitions are
not accompanied by heat release but by large (compared with interatomic distances) …

We predict by means of density functional theory simulations the structures of self-trapped
triplet excitons in HfO 2 and HfSiO 4, and compare their properties to those of the self …

The systems registering plasma radiation comprise optical elements, which may distort a
diagnostic signal if they are not radiation resistant. The work was aimed at experimental …

The polarization of the x-ray-induced blue luminescence from synthetic quartz has been
measured between 80 and 225 K. Two overlapping bands having different polarizations are …

The luminescence of self-trapped exciton (STE) was found and systematically studied in
tetrahedron structured silica crystals (α-quartz, coesite, cristobalite) and glass. In octahedron …

It is shown that two differently oriented (perpendicular and parallel to the c axis) serf-trapped
excitons (STE⊥ and STE∥) can be created in the range of the Urbach tail of the …

The self-trapped exciton (STE) is discovered in the GeO 2 crystal. A PL band at 2.5 eV with a
strong Stokes shift is excited only in the fundamental absorption range of GeO 2 crystal with …