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Träfflista för sökning "WFRF:(Karim Amir) ;pers:(Berggren Jesper)"

Sökning: WFRF:(Karim Amir) > Berggren Jesper

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1.
  • Gustafsson, Oscar, et al. (författare)
  • Long-wavelength infrared photoluminescence from InGaSb/InAs quantum dots
  • 2013
  • Ingår i: Infrared physics & technology. - : Elsevier BV. - 1350-4495 .- 1879-0275. ; 59, s. 89-92
  • Tidskriftsartikel (refereegranskat)abstract
    • We study the growth of self-assembled InGaSb/InAs quantum dots (QDs) and investigate how gallium can be used to reduce the optical transition energy in the InSb QD system. InGaSb QDs were grown on InAs (0 0 1) substrates by metal-organic vapor-phase epitaxy (MOVPE) and the material was characterized by photoluminescence (PL) measurements. A PL peak wavelength is demonstrated beyond 8 μm at 77 K, which is significantly longer than what has been reported for InSb QDs. The results suggest that InGaSb QDs can be grown at a larger size than InSb QDs leading to reduced confinement in the QDs.
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2.
  • Gustafsson, Oscar, et al. (författare)
  • Photoluminescence photoresponse from InSb/InAs-based quantum dot structures
  • 2012
  • Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 20:19, s. 21264-71
  • Tidskriftsartikel (refereegranskat)abstract
    • InSb-based quantum dots grown by metal-organic vapor-phase epitaxy (MOVPE) on InAs substrates are studied for use as the active material in interband photon detectors. Long-wavelength infrared (LWIR) photoluminescence is demonstrated with peak emission at 8.5 μm and photoresponse, interpreted to originate from type-II interband transitions in a p-i-n photodiode, was measured up to 6 μm, both at 80 K. The possibilities and benefits of operation in the LWIR range (8-12 μm) are discussed and the results suggest that InSb-based quantum dot structures can be suitable candidates for photon detection in the LWIR regime.
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