Energy Transfer Between Excitons and the 3d-Electrons of Mn2+ In Zn1_Xmnxse
No Thumbnail Available
Date
1995-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa, Ethiopia
Abstract
In this thesis the excitation spectra of the 4TI ---+ 6 Al emission of Mn2
+ in Znl . .Mr\Se
crystals and their dependence on the crystal temperature, intensity of the exciting laser and
manganese concentration (x $ 0.016) are investigated. Eventhougth some of the excitation
spectra of these crystals were published in literature the origin of one of the excitation band
( M-band ) still remains unknown. The M-band is an excitation band of the 4TI ---+ 6AI
emission of Mn2
+ in Znl.MnxSe within the spectral range of bound excitons. Computer
fitting techniques were used to determine some important parameters of the M-band and the
bound exciton band (BE-band).
F rom the comparison of the crystal temperature, exciting laser intensity and Mn
concentration dependence of some of these fitting parameters of the M-band with that of the
BE-band it is found that the M-band is built up of a multiple of bound excitons, which are
different from that of the BE-band.
Description
Keywords
Energy Transfer Between Excitons