Determination of Optical Gain of Self-Trapped Exciton Luminescence in CdI_2
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概要
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Luminescence from self-trapped excitons in high-purity CdI_2 has been studied at liquid nitrogen temperature under intense excitation by a pulsed nitrogen laser. Luminescence intensity was carefully measured by changing excitation density and length of the excited region on a crystal surface. Obtained results are well explained by introducing a stimulated emission process into radiative decay channels of the self-trapped excitons. The net optical gain depends strongly on the excitation density and is estimated as 6 cm^<-1> in its maximum value which is extremely smaller than the previously reported one. Discussions will be made on consistency among the excitation-density dependence, the excitation-length dependence and the luminescence decay profiles.
- 社団法人日本物理学会の論文
- 1994-12-15
著者
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Kitaura M
Fukui National Coll. Technol. Sabae
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OHNISHI Akimasa
Department of Physics, Faculty of Science, Yamagata University
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NAKAGAWA Hideyuki
Department of Electrical and Electronics Engineering, Fukui University
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KITAURA Mamoru
Department of Electrical and Electronics Engineering,Faculty of Engineering,Fukui University
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Nakagawa H
Department Of Electrical And Electronics Engineering Fukui University
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Nakagawa Hideyuki
Department Of Anesthesiology Saitama International Medical Center Saitama Medical University
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Ohnishi A
Department Of Physics Faculty Of Science Yamagata University
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Ohnishi Akimasa
Department Of Physics Faculty Of Science Yamagata University
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KITAURA Mamoru
Yamagata University, Faculty of Science
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