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    Título
    Polarization-Resolved Near-Field Spectroscopy of Localized States in m-Plane InxGa1−xN/GaN Quantum Wells
    Autor
    Ivanov, Ruslan
    Martínez Sacristán, ÓscarAutoridad UVA Orcid
    Kuritzky, Leah Y.
    Myers, Daniel J.
    Nakamura, Shuji
    Speck, James S.
    Año del Documento
    2017
    Editorial
    American Physical Society
    Descripción
    Producción Científica
    Documento Fuente
    Physical Review Applied, 2017, vol. 7, n. 6, 064033
    Resumen
    We present a polarization, spectrally, and spatially resolved near-field photoluminescence (PL) measurement technique and apply it to the study of wide m-plane InxGa1−xN/GaN quantum wells grown on on-axis and miscut GaN substrates. It is found that PL originates from localized states; nevertheless, its degree of linear polarization (DLP) is high with little spatial variation. This allows an unambiguous assignment of the localized states to InxGa1−xN composition-related band potential fluctuations. Spatial PL variations, occurring due to morphology features of the on-axis samples, play a secondary role compared to the variations of the alloy composition. The large PL peak wavelength difference for polarizations parallel and perpendicular to the c axis, the weak correlation between the peak PL wavelength and the DLP, and the temperature dependence of the DLP suggest that effective potential variations and the hole mass in the second valence-band level are considerably smaller than that for the first level. DLP maps for the long wavelength PL tails have revealed well-defined regions with a small DLP, which have been attributed to a partial strain relaxation around dislocations.
    Palabras Clave
    Optoelectronics
    Photonics
    ISSN
    2331-7019
    Revisión por pares
    SI
    DOI
    10.1103/PhysRevApplied.7.064033
    Patrocinador
    Swedish Energy Agency (Contract No. 36652-1)
    Swedish Research Council (Contract No. 621-2013- 4096)
    Version del Editor
    https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.7.064033
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/35203
    Derechos
    openAccess
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    • DEP32 - Artículos de revista [284]
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