title: ZnCdSe/ZnCdMgSe quantum well infrared photodetector.
abstract: We report the design, fabrication and characterization of a II-VI Zn(0.51)Cd(0.49)Se / Zn<sub>0.45(Cd)0.42(Mg)(0.13)Se-based quantum well infrared photodetector (QWIP) with a bound to quasi-bound transition centered at 8.7 µm. The good growth quality of the epitaxial layers was verified by x-ray diffraction measurements. Absorption and photocurrent measurements yield results consistent with conventional III-V QWIPs. Photocurrent measurements reveal an exponential decrease with temperature. In addition, we also observe more than 4 orders of magnitude increase in photocurrent with applied bias. By compensating the drop in temperature performance with an increase in applied bias, we achieve an operating temperature of up to 140K and a responsivity of 1-10 µA/W.
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA. aravikum@princeton.edu
authors.forename: Arvind P
authors.initials: AP
authors.lastname: Ravikumar
authors.forename: Adrian
authors.initials: A
authors.lastname: Alfaro-Martinez
authors.forename: Guopeng
authors.initials: G
authors.lastname: Chen
authors.forename: Kuaile
authors.initials: K
authors.lastname: Zhao
authors.forename: Maria C
authors.initials: MC
authors.lastname: Tamargo
authors.forename: Claire F
authors.initials: CF
authors.lastname: Gmachl
authors.forename: Aidong
authors.initials: A
authors.lastname: Shen
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D010783:Photometry / Q000295:instrumentation*; D017785:Photons; D018036:Selenium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D017967:Zinc Compounds / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds; C058667:cadmium selenide; C044696:zinc selenide