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Search: WFRF:(Hakkarainen Teppo)

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1.
  • Hakkarainen, Teppo, et al. (author)
  • Spatially resolved characterization of InGaAs/GaAs quantum dot structures by scanning spreading resistance microscopy
  • 2010
  • In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 97:4, s. 041106-
  • Journal article (peer-reviewed)abstract
    • Cross-sectional scanning spreading resistance microscopy (SSRM) is used to investigate stacked InGaAs/GaAs quantum dot (QD) structures with different doping schemes. Spatially resolved imaging of the QDs by SSRM is demonstrated. The SSRM contrast obtained for the QD layers is found to depend on doping in the structure. In the undoped structures both QD-layers and QDs within the layers could be resolved, while in the doped structures the QD layers appear more or less uniformly broadened. The origin of the SSRM contrast in the QD layer in the different samples is discussed and correlated with doping schemes. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3467138]
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2.
  • Lourdudoss, Sebastian, et al. (author)
  • Heteroepitaxy and selective epitaxy for discrete and integrated devices
  • 2006
  • In: 2006 CONFERENCE ON OPTOELECTRONIC AND MICROELECTRONIC MATERIALS & DEVICES. - NEW YORK : IEEE. - 9781424405770 ; , s. 309-311
  • Conference paper (peer-reviewed)abstract
    • We present first results on heteroepitaxy of InP on silicon on insulator (SOI). We also demonstrate InP nanopillar fabrication by means of selective epitaxy. Selective epitaxy is also exploited to fabricate advanced photonic integrated devices for Optical Code Division Multiplex Access (OCDMA) networking applications.
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