Mechanism of the Green-Copper Luminescence in ZnS Crystals. : II. Polarization Characteristics
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概要
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The polarization characteristics of the green-copper luminescence were investigated at liquid helium temperature using a melt-grown ZnS:Cu, Al crystal with cubic structure involving stacking faults. In accord with the results of the previous study at liquid nitrogen temperature, the luminescence is polarized preferentially perpendicular to the [111]_c axis. The origin of this polarization is attributed to the crystal field with trigonal nature of the host lattice, and the polarization characteristics are interpreted on the basis of the donor-acceptor pair emission mechanism. With increasing temperature from liquid helium temperature, I_⊥ decreases while I_‖ increases keeping I=I_⊥+I_‖ constant, I_⊥ and I_‖ being the intensities of luminescence polarized perpendicular and parallel to the [111]_c axis. These facts are accounted for, if one takes the thermal excitation of holes associated with copper acceptors into account.
- 社団法人日本物理学会の論文
- 1971-11-05
著者
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Shionoya Shigeo
The Institute For Solid State Physics The University Of Tokyo
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SUZUKI Atsushi
The Institute for Solid State Physics The University of Tokyo
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