Spectroscopic studies of zinc(1-x) manganese(x) sulfur

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" Spectroscopic studies of zinc(1-x) manganese(x) sulfur "
X. Chen F. D. Medina

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1112404
Doc. No	:	TLpq220051405
Main Entry	:	F. D. Medina
	:	X. Chen
Title & Author	:	Spectroscopic studies of zinc(1-x) manganese(x) sulfur\ X. ChenF. D. Medina
College	:	Florida Atlantic University
Date	:	1992
student score	:	1992
Degree	:	M.S.
Page No	:	132
Abstract	:	The optical properties of the diluted magnetic semiconductor Zn1-xMnxS have been studied by using photoluminescence emission, lifetime and excitation spectroscopies. In photoluminescence spectroscopy three bands were found peaking at 585 nm (yellow band), 650 nm (orange band) and 750 nm (red band). For the yellow and red bands the peak position changes little with Mn concentration. For the orange band the peak energy decreases with increasing Mn concentration. The lifetimes of the yellow, orange and red bands were found to be about 70, 50 and 7 mus. The results of the lifetime measurements support the assumption that there is energy transfer from the yellow to the red band through radiationless transitions. In the excitation spectroscopy of the yellow band four peaks were found peaking near 526, 487, 461 and 426 nm. These four bands have been ascribed to transitions from the four lowest excited states of Mn to the ground state. (Abstract shortened with permission of author.)
Subject	:	Condensation
	:	Optics
	:	Optics
	:	Physics
	:	Physics
	:	Pure sciences