| Irradiated Ag-doped photosensitive glass shows an induced
absorption band at 275 nm which apparently belongs to
electron or hole-centres. During heat-treatment, the induced
band at 275 nm disappears and a band at 410 nm, appears.
This band is attributed due to absorption by very fine colloidal
particles through the coagulation of silver atoms,
and then growth associated with the phase separation
process taking place in the glass. |
