Site selective spectroscopy and crystal field analysis of Er3+ in Ca3Ga2Ge3O12 garnet

Citation
Rc. Santana et al., Site selective spectroscopy and crystal field analysis of Er3+ in Ca3Ga2Ge3O12 garnet, J PHYS-COND, 13(39), 2001, pp. 8853-8868
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
13
Issue
39
Year of publication
2001
Pages
8853 - 8868
Database
ISI
SICI code
0953-8984(20011001)13:39<8853:SSSACF>2.0.ZU;2-9
Abstract
A detailed study of the optical spectroscopy of Er3+ in Ca3Ga2Ge3O12 crysta ls is reported. Several site selective techniques were employed (absorption , luminescence, excitation and up-conversion). The combined use of these te chniques allowed the separation and classification of the observed spectral lines. Six different Er3+ optical centres are observed. The energy level a nalysis was performed using a parametric Hamiltonian for the 4f(11) electro nic configuration of Er3+ in a D-2 symmetry site. A set of parameters was o btained by fitting calculated to experimental energy levels for each identi fied centre. Differences among centres were analysed and related to the dif ferent charge compensating mechanisms.