Emission spectrum of Ti3+ :Gd3Sc2Al3O12 garnet crystal

✍ Scribed by Y. Gao; M. Yamaga; B. Henderson; K.P. O'Donnell

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 347 KB
• Volume: 210
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89101-m

✦ Synopsis

The photoluminescence spectrum of Ti'+-doped Gd,Sc2Al,0,2 observed at 77 K and below consists of a series of zero-phonon lines with vibronic structure and a broad band spanning the wavelength range 650 to 1300 nm. By using time-resolved spectroscopy this spectrum has heen shown to have overlapping features due to Cr'+ ions, present as ubiquitous impurities in most garnets, and Ti'+ ions, as the dominant active species in these crystals. The Cr '+ impurities are revealed by the zero-phonon lines at 689.2-690.4 nm with attendant phonon-assisted structure. The broadband with peak at 850 nm is identified with the multiphonon sideband of the *E+*Tz transition of Ti'+ in trigonally-distorted sites in Gd&2A1,0,2.