UM
Redshifting of a bound-to-continuum GaAs/AIGaAs quantum-well infrared photodetector response via laser annealing
Sengupta D.K.1; Horton T.1; Fang W.1; Curtis A.1; Li J.1; Chuang S.L.1; Chen H.1; Feng M.1; Stillman G.E.1; Kar A.1; Mazumder J.1; Li L.3; Liu H.C.3
1997-06-30
Source PublicationApplied Physics Letters
ISSN00036951
Volume70Issue:26Pages:3573-3575
AbstractThe effect of laser annealing on important detector characteristics such as dark current, spectral response, and absolute responsivity is investigated for bound-to-continuum GaAs/AlGaAs quantum-well infrared photodetectors (QWIPs) operating in the 8-12 μm wavelength regime. A set of experiments was conducted on QWIPs fabricated from both as-grown and laser-annealed multiple-quantum-well structures. Compared to the as-grown structure, the peak spectral response of the laser-annealed structure was shifted to longer wavelengths, though absolute responsivity was decreased by about a factor of two. In addition, over a wide range of bias levels, the laser-annealed QWIPs exhibited a slightly lower dark current compared to the as-grown QWIPs. Thus, the postgrowth control of GaAs/AlGaAs quantum-well composition profiles by laser annealing offers unique opportunities to fine tune various aspects of a QWIP' s response. © 1997 American Institute of Physics.
DOI10.1063/1.119237
URLView the original
Language英語
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Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.University of Illinois at Urbana-Champaign
2.University of Central Florida
3.National Research Council Canada
4.Jet Propulsion Laboratory, California Institute of Technology
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GB/T 7714
Sengupta D.K.,Horton T.,Fang W.,et al. Redshifting of a bound-to-continuum GaAs/AIGaAs quantum-well infrared photodetector response via laser annealing[J]. Applied Physics Letters,1997,70(26):3573-3575.
APA Sengupta D.K..,Horton T..,Fang W..,Curtis A..,Li J..,...&Liu H.C..(1997).Redshifting of a bound-to-continuum GaAs/AIGaAs quantum-well infrared photodetector response via laser annealing.Applied Physics Letters,70(26),3573-3575.
MLA Sengupta D.K.,et al."Redshifting of a bound-to-continuum GaAs/AIGaAs quantum-well infrared photodetector response via laser annealing".Applied Physics Letters 70.26(1997):3573-3575.
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