Micro-photoluminescence mapping of light emissions from aluminum-coated InGaN/GaN quantum wells

Kazutaka Tateishi, Pangpang Wang, Sou Ryuzaki, Mitsuru Funato, Yoichi Kawakami, Koichi Okamoto, Kaoru Tamada

Research output: Contribution to journalArticlepeer-review


Micro-photoluminescence (PL) mapping was investigated for Al-coated InGaN/GaN quantum wells (QWs), which showed huge PL enhancement by the surface plasmon (SP) resonance. The obtained images show inhomogeneity at the micro-meter scale; in addition, the region with lower PL intensities tend to have a longer PL wavelength for bare QWs. This correlation changed with an Al coating, positive correlations were observed in an area with a relatively short peak wavelength with blue-shift. Conversely, negative correlations were observed at longer peak wavelengths. These results suggest that the quantum-confined Stark effect (QCSE) was screened by the enhanced electrical-field of the SP resonance.

Original languageEnglish
Article number052016
JournalApplied Physics Express
Issue number5
Publication statusPublished - May 1 2019

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)


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