35 citations · 71 across the 10 of their papers we have counts for
10 papers
Evidence of delocalized excitons in amorphous solids
Fabrizio Messina, Eleonora Vella, Marco Cannas +1
We studied the temperature dependence of the absorption coefficient of amorphous SiO in the range from 8 to 17.5~eV obtained by Kramers-Kronig dispersion analysis of reflectivi…
Photoluminescence dispersion as a probe of structural inhomogeneity in silica
Michele D'Amico, Fabrizio Messina, Marco Cannas +2
We report time-resolved photoluminescence spectra of point defects in amorphous silicon dioxide (silica), in particular the decay kinetics of the emission signals of extrinsic Oxyg…
Isoelectronic series of oxygen deficient centers in silica: experimental estimation of homogeneous and inhomogeneous spectral widths
Michele D'Amico, Fabrizio Messina, Marco Cannas +2
We report nanosecond time-resolved photoluminescence measurements on the isoelectronic series of oxygen deficient centers in amorphous silica, Si-ODC(II), Ge-ODC(II) and Sn-ODC(II)…
Homogeneous and inhomogeneous contributions to the luminescence linewidth of point defects in amorphous solids: Quantitative assessment based on time-resolved emission spectroscopy
Michele D Amico, Fabrizio Messina, Marco Cannas +2
The article describes an experimental method that allows to estimate the inhomogeneous and homogeneous linewidths of the photoluminescence band of a point defect in an amorphous so…
Optical Absorption and Electron Paramagnetic Resonance of the E'-alpha Center in Amorphous Silicon Dioxide
G. Buscarino, R. Boscaino, S. Agnello +1
We report a combined study by optical absorption (OA) and electron paramagnetic resonance (EPR) spectroscopy on the E'-alpha point defect in amorphous silicon dioxide (a-SiO2). Thi…
Optical absorption induced by UV laser radiation in Ge-doped amorphous silica probed by in situ spectroscopy
F. Messina, M. Cannas, R. Boscaino +2
We studied the optical absorption induced by 4.7eV pulsed laser radiation on Ge-doped a-SiO2 synthesized by a sol-gel technique. The absorption spectra in the ultraviolet spectral…