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Reduction in dark current using resonant tunneling barriers in quantum dots-in-a-well long wavelength infrared photodetector

DSpace at IIT Bombay

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Title Reduction in dark current using resonant tunneling barriers in quantum dots-in-a-well long wavelength infrared photodetector
 
Creator BARVE, AV
SHAH, SY
SHAO, J
VANDERVELDE, TE
SHENOI, RV
JANG, WY
KRISHNA, S
 
Subject detector
 
Description We report the use of resonant tunneling (RT) assisted barriers to reduce the dark current in quantum dots-in-a-well (DWELL) infrared photodetectors. Designed RT barriers allow energy-selective extraction of photoexcited carriers while blocking a continuum of energies. Over two orders of magnitude reduction in the dark current in the RT-DWELL device over a control sample without RT-DWELL at 77 K has been demonstrated. Specific detectivity (D*) of 3.6 x 10(9) cm Hz(1/2) W(-1) at 77 K at lambda(peak) 11 mu m with a conversion efficiency of 5.3% was obtained in the RT-DWELL device. D* for the RT-DWELL device is five times higher than that of the control sample. (C) 2008
 
Publisher AMER INST PHYSICS
 
Date 2011-07-16T13:21:36Z
2011-12-26T12:49:47Z
2011-12-27T05:35:29Z
2011-07-16T13:21:36Z
2011-12-26T12:49:47Z
2011-12-27T05:35:29Z
2008
 
Type Article
 
Identifier APPLIED PHYSICS LETTERS, 93(13), -
0003-6951
http://dx.doi.org/10.1063/1.2996410
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4436
http://hdl.handle.net/10054/4436
 
Language en