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Ultrafast Exciton Trapping Dynamics in ZnSe/(CdSe)m (ZnSe))n Short Period Superlattice Quantum Wells |
LIN Wei-zhu1,2;PENG Wen-ji1;XIE Cang2;XU Geng2;PENG Zhong-ling3;YUAN Shi-xin3 |
1 Ultrafast Laser Spectroscopy National Laboratory, 2Department of Physics, Zhongshan University, Guangzhou 510275
3Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083 |
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Cite this article: |
LIN Wei-zhu, PENG Wen-ji, XIE Cang et al 1996 Chin. Phys. Lett. 13 141-144 |
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Abstract The ultrafast exciton trapping dynamics in ZnSe/ZnCdSe short period superlattice quantum wells has been studied by using transient photoluminescence spectroscopy. A rapid exciton trapping time of less than 7ps from the barriers to the wells is measured. In Te doped samples self-trapped excitons give rise to Stokes shifted broad band luminescence and exhibit much longer lifetime.
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Keywords:
78.47.+p
78.55.Et
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Published: 01 February 1996
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