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    Carrier redistribution between different potential sites in semipolar (202¯1) InGaN quantum wells studied by near-field photoluminescence

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    Type
    Article
    Authors
    Marcinkevičius, S.
    Gelžinytė, K.
    Zhao, Y.
    Nakamura, S.
    DenBaars, S. P. cc
    Speck, J. S.
    Date
    2014-09-16
    Online Publication Date
    2014-09-16
    Print Publication Date
    2014-09-15
    Permanent link to this record
    http://hdl.handle.net/10754/597736
    
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    Abstract
    © 2014 AIP Publishing LLC. Scanning near-field photoluminescence (PL) spectroscopy at different excitation powers was applied to study nanoscale properties of carrier localization and recombination in semipolar (202¯1) InGaN quantum wells (QWs) emitting in violet, blue, and green-yellow spectral regions. With increased excitation power, an untypical PL peak energy shift to lower energies was observed. The shift was attributed to carrier density dependent carrier redistribution between nm-scale sites of different potentials. Near-field PL scans showed that in (202¯1) QWs the in-plane carrier diffusion is modest, and the recombination properties are uniform, which is advantageous for photonic applications.
    Citation
    Marcinkevičius S, Gelžinytė K, Zhao Y, Nakamura S, DenBaars SP, et al. (2014) Carrier redistribution between different potential sites in semipolar (202¯1) InGaN quantum wells studied by near-field photoluminescence. Applied Physics Letters 105: 111108. Available: http://dx.doi.org/10.1063/1.4896034.
    Sponsors
    The research at KTH was performed within the frame of Linnaeus Excellence Center for Advanced Optics and Photonics (ADOPT) and was financially supported by the Swedish Energy Agency (Contract No. 36652-1) and the Swedish Research Council (Contract No. 621-2013-4096). The research at UCSB was supported by the Solid State Lighting and Energy Electronic Center (SSLEEC) and by the KACST-KAUST-UCSB Solid State Lighting Program (SSLP).
    Publisher
    AIP Publishing
    Journal
    Applied Physics Letters
    DOI
    10.1063/1.4896034
    ae974a485f413a2113503eed53cd6c53
    10.1063/1.4896034
    Scopus Count
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    Publications Acknowledging KAUST Support

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