Title of article
Transition behaviors in biased asymmetric quantum dot-in-double-well photodetector
Author/Authors
Shin، نويسنده , , H.W. and Choe، نويسنده , , J.-W. and Lee، نويسنده , , S.J. and Noh، نويسنده , , S.K and Kim، نويسنده , , J.O. and Lee، نويسنده , , K.-S.، نويسنده ,
Issue Information
ماهنامه با شماره پیاپی سال 2014
Pages
4
From page
721
To page
724
Abstract
A triple-band mid-/far-infrared (MIR/FIR) photodetector tunable by polarity is demonstrated by asymmetric quantum dot-in-double-well (DdWELL) structure that exhibits unique photoresponse (PR) transitions. In contrast to the MIR2 band with no dependence, the two MIR1/FIR PR bands are blue/red-shifted by the bias voltage, and the MIR2-FIR dual-band spectrum changes to a single-band feature due to the polarity. A four-level energy band model is proposed for the transition scheme, and the electric field dependence of the FIR band numerically calculated by a simplified DdWELL structure is in good agreement with the experimental PR spectra.
Keywords
Quantum dot in double well , Asymmetric quantum well , Photoresponse spectra , Infrared photodetector
Journal title
Current Applied Physics
Serial Year
2014
Journal title
Current Applied Physics
Record number
1792088
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