NDLI: Noise, Gain, and Responsivity in Low-Strain Quantum Dot Infrared Photodetectors With up to 80 Dot-in-a-Well Periods

Content Provider	IEEE Xplore Digital Library
Author	Vines, P. Tan, C.H. David, J.P.R. Attaluri, R.S. Vandervelde, T.E. Krishna, S.
Copyright Year	1965
Abstract	We present a systematic study of noise, gain, responsivity, and specific detectivity D* , in a series of low-strain dot-in-a-well (DWELL) quantum dot infrared photodetectors (QDIPs). The lattice-matched GaAs quantum wells and AlGaAs barriers in these devices prevent the accumulation of excessive strain and allow the growth of up to 80 DWELL periods. We show that the photoconductive gain in these QDIPs is inversely proportional to the number of periods, while the total quantum efficiency is proportional to the number of periods, meaning that the responsivity remains constant at a given mean electric field as the number of periods is varied. The dark current in each QDIP was also found to be constant at a given mean electric field.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	607
Ending Page	613
Page Count	7
File Size	547831
File Format	PDF
ISSN	00189197
Volume Number	47
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dark current Noise Gallium arsenide Current measurement Quantum dots Diamond-like carbon Measurement uncertainty specific detectivity Dot-in-a-well gain noise period quantum dot infrared photodetectors responsivity
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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