The optical properties of chromium-doped sodium silicate glass synthesized under oxidizing conditions have been investigated. The method of preparation provides a large concentration of Cr6+ ions, but absorption and emission spectra showed that a small amount of Cr3+ (and Cr5+) ions are always present. The Dq-, B- and C-parameters of the crystal-field theory for the Cr3+ ion were obtained, confirming the glassy nature of the sample. Cr3+ luminescence was observed in the near-infrared region, even at room temperature, confirming the low value of the crystal-field Dq. Moreover, the high ultraviolet transparency of this matrix allows observation of a well resolved absorption spectrum of the Cr6+ ion.
Casalboni, M., Ciafardone, V., Giuli, G., Izzi, B., Paris, E., Prosposito, P. (1996). An optical study of silicate glass containing Cr3+ and Cr6+ ions. JOURNAL OF PHYSICS. CONDENSED MATTER, 8(46), 9059-9069 [10.1088/0953-8984/8/46/011].
An optical study of silicate glass containing Cr3+ and Cr6+ ions
CASALBONI, MAURO;PROSPOSITO, PAOLO
1996-01-01
Abstract
The optical properties of chromium-doped sodium silicate glass synthesized under oxidizing conditions have been investigated. The method of preparation provides a large concentration of Cr6+ ions, but absorption and emission spectra showed that a small amount of Cr3+ (and Cr5+) ions are always present. The Dq-, B- and C-parameters of the crystal-field theory for the Cr3+ ion were obtained, confirming the glassy nature of the sample. Cr3+ luminescence was observed in the near-infrared region, even at room temperature, confirming the low value of the crystal-field Dq. Moreover, the high ultraviolet transparency of this matrix allows observation of a well resolved absorption spectrum of the Cr6+ ion.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
