Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/62901
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dc.titleTwo-color infrared detection using intersubband transitions in multiple step quantum wells with superlattice barriers
dc.contributor.authorMei, T.
dc.contributor.authorKarunasiri, G.
dc.contributor.authorChua, S.J.
dc.date.accessioned2014-06-17T06:56:07Z
dc.date.available2014-06-17T06:56:07Z
dc.date.issued1997-10-06
dc.identifier.citationMei, T.,Karunasiri, G.,Chua, S.J. (1997-10-06). Two-color infrared detection using intersubband transitions in multiple step quantum wells with superlattice barriers. Applied Physics Letters 71 (14) : 2017-2019. ScholarBank@NUS Repository.
dc.identifier.issn00036951
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/62901
dc.description.abstractA dual-band multiple quantum well infrared photodetector has been fabricated for the near and mid-infrared detection. The structure consists of InGaAs/GaAs step quantum wells separated by AlGaAs/GaAs superlattice barriers. The step quantum wells are designed to have two bound states and a quasi-continuum above the superlattice barriers. The bound-to-bound and bound-to-continuum transitions are employed for the dual-band detection. The superlattice barriers are used to extract the photocurrent from the bound-to-bound transition with a relatively low external electric field, which keeps the dark current low. This work demonstrates the use of a new quantum well structure for the fabrication of multicolor quantum well infrared photodetectors. © 1997 American Institute of Physics.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentELECTRICAL ENGINEERING
dc.description.sourcetitleApplied Physics Letters
dc.description.volume71
dc.description.issue14
dc.description.page2017-2019
dc.description.codenAPPLA
dc.identifier.isiutNOT_IN_WOS
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