Luminescence in Strongly Excited CdI2
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概要
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Luminescence studies were made on Cd~ crystals at LHeT andLNT under the strong excitation in the excitonic absorptionband by a N2-gas laser. New emission bands appear in additionto and superimposed on usual intrinsic emission bands. Theintensities of the bands show superlinear dependence upon theexcitation intensity and the length of the excited region.The optical gain spectrum which was obtained at LNT bymeasuring the dependence of the luminescent intensity on theexcitation length, has a prominent peak at 2.37 eV in theintrinsic green(G)-emission region and a shoulder around2.8 eV. The decay curves-consists of two components, the fastand slow ones. Increasing the excitation intensity, the fastcomponent becomes stronger and faster while the slow one isdiminished. The slow cqmponent is mainly due to the intrinsjcY-emission. The fast component is associated with the newemissions characteristic of the strong excitation. An analysisof these experimental results leads to the conclusion that thenew emissions are associated with the stimulated emissionprocess through the relaxed excitonic states (RES).
- 福井大学工学部の論文
福井大学工学部 | 論文
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