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Effects of contact space charge on the performance of quantum intersubband photodetectors

DSpace at IIT Bombay

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Title Effects of contact space charge on the performance of quantum intersubband photodetectors
 
Creator BARVE, AV
MEESALA, S
SENGUPTA, S
KIM, JO
CHAKRABARTI, S
KRISHNA, S
 
Subject WELL INFRARED PHOTODETECTORS
MODEL
 
Description Highly non-uniform electric field exists in the active region of quantum intersubband devices, primarily due to the presence of PN junctions forming between heavily doped contact regions and non-intentionally doped barriers. Using a combination of experiments and theoretical simulations, we investigate the effect of this non-uniform internal electric field on the photodetector operation. Three quantum dots-in-a-well (DWELL) photodetectors have been fabricated with top spacer, bottom spacer, and no spacer around the active region, respectively, to demonstrate the effect of the non-uniform field. Drift-diffusion based calculations of the electric field provide further insight into the device operation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4712601]
 
Publisher AMER INST PHYSICS
 
Date 2014-10-17T05:04:52Z
2014-10-17T05:04:52Z
2012
 
Type Article
 
Identifier APPLIED PHYSICS LETTERS, 100(19)
http://dx.doi.org/10.1063/1.4712601
http://dspace.library.iitb.ac.in/jspui/handle/100/16021
 
Language en