Physical disorder and optical properties in the vacuum ultraviolet region of amorphous SiO(2).
The optical absorption of point-defect-free SiO(2) glass in the vacuum ultraviolet region is primarily controlled by the concentrations of three- and four-membered ring structures composed of heavily strained Si-O-Si bonds. The main channel of color center formation by F(2) excimer laser (7.9 eV) irradiation is not Frenkel-defect generation of oxygen via two-photon absorption processes but a pair generation of E' and nonbridging oxygen hole centers by the one-photon excitation of these strained bonds with 7.9 eV photons.
Hosono
H
H
Transparent Electro Active Materials, Exploratory Research for Advanced Technology, Japan Science and Technology Corporation, KSP C-1232, Sakato 3-2-1, Takatsu, Kawasaki 213-0012, Japan.
Ikuta
Y
Y
Kinoshita
T
T
Kajihara
K
K
Hirano
M
M