Near-infrared near-field photoluminescence imaging spectroscopy of exciton localized states in GaInNAs/GaAs quantum wells due to nonuniform distribution of nitrogen

Ryosuke Kubota, Koji Nakashima, Dai Mizuno, Toshiharu Saiki, Masaru Sakai, Kazunari Matsuda, Takashi Ishizuka

研究成果: Article査読

抄録

The nonuniform distribution of nitrogen in dilute GaInNAs alloys was investigated by low-temperature near-field photoluminescence (PL) imaging spectroscopy of localized states driven by giant band-gap reduction due to nitrogen incorporation. The depths and spatial profiles of exciton confinement potential were visualized through the measurement of power-dependent PL spectra and high-resolution PL images. For two GaInNAs quantum wells with different nitrogen contents, we observed strongly localized excitons confined in nitrogen clusters and rather delocalized excitons, which indicate the onset of alloy formation

本文言語English
論文番号11592
ジャーナルJournal of Nanophotonics
1
1
DOI
出版ステータスPublished - 2007

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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