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Time resolved photoluminescence studies of perpendicular transport in CdTe/Cd1−xMnxTe short‐period superlattices

 

作者: R. Hellmann,   A. Pohlmann,   E. O. Go¨bel,   D. R. Yakovlev,   A. Waag,   R. N. Bicknell‐Tassius,   G. Landwehr,  

 

期刊: Journal of Applied Physics  (AIP Available online 1993)
卷期: Volume 74, issue 8  

页码: 5272-5274

 

ISSN:0021-8979

 

年代: 1993

 

DOI:10.1063/1.354270

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We present time‐resolved photoluminescence studies of perpendicular transport and the subsequent capture of photoexcited carriers in II–VI semiconductor superlattices with an enlarged quantum well. The trapping dynamics are investigated as a function of the superlattice period in the range of 30–80 A˚. We observed an efficient collection of electrons and holes in an enlarged CdTe quantum well confined by a short‐period CdTe/Cd1−xMnxTe superlattice. Both the characteristic time and the efficiency of carrier collection are found to be strongly dependent on the superlattice period. A time constant less of than 25 ps is determined for the carrier collection in a 30‐A˚‐period superlattice. Our experimental findings give evidence of Bloch type perpendicular transport in electron and heavy‐hole minibands.

 

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