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Electric field screening by photogenerated holes in multiple quantum wells: A new mechanism for absorption saturation

 

作者: Thomas H. Wood,   John Z. Pastalan,   Charles A. Burrus,   Bart C. Johnson,   Barry I. Miller,   Jose L. deMiguel,   Uziel Koren,   Martin G. Young,  

 

期刊: Applied Physics Letters  （AIP Available online 1990）
卷期: Volume 57, issue 11  

页码: 1081-1083

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.103539

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We observe saturation in the electroabsorption of InGaAs/InP multiple quantum wells (MQWs) at high optical intensity. Contrary to the mechanism for zero‐field MQWs, we find that saturation occurs due to the presence of trapped photogenerated holes that screen the MQWs from the applied electric field. By carefully measuring the absorption coefficient of the wells and the emission time for holes, we are able to fit the observed electroabsorption saturation with no adjustable parameters.

 

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