EXCITED STATE ABSORPTION FROM METASTABLE STATES OF IONS IN CRYSTAL.
Abstract
A spectrometer system for studying optical absorption from metastable states of ions in crystal is described. Absorption cross sections for excited state absorption from the metastable (2)E state in Al2O3:Cr(3+) were measured at temperatures of 300K, 105K and 40K in the wavelength region from 2300A to 7100A. The excited state population was obtained at 105K and 40K by using the vibronics of the (4)T2 ground state absorption band. Excited state absorption from the (2)E state was observed in MgO:Cr(3+) with a strong peak at 2800A. Strong excited state absorption bands were found near 4750A, 3170A, 2850A and 2470A of a pumped SrF2:Sm(2+) crystal and near 4750A, 3280A, 2740A and 2470A of a pumped SrCl2:Sm(2+) crystal. These bands were explained to be transitions from (5)Do(4f(6)) to higher quintet states of 4f(5)5d configuration. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0671713
Entities
People
- Jacob W. Huang
Organizations
- Johns Hopkins University