Micro-photoluminescence mapping of surface plasmon-coupled emission from InGaN/GaN quantum wells

Koichi Okamoto, Kazutaka Tateishi, Kaoru Tamada, Mitsuru Funato, Yoichi Kawakami

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

Micro-photoluminescence (PL) mapping was investigated to elucidate the detailed mechanism of surface plasmon (SP)-enhanced emissions from InGaN/GaN quantum wells (QWs) with Ag or Al coating. The PL wavelengths were obviously red-shifted with Ag films, while the PL peak wavelengths were not changed with Al coating. The relationship between the PL peak intensity and the PL wavelength at each pixel showed a positive or negative correlation for the uncoated part of the InGaN/GaN QWs with blue or green emission, respectively. We found that these correlations disappeared in the Ag-coated regions. These results suggest that the energy transfer from the excitons to the SPs should be much faster than that in the exciton localization and charge screening processes of the piezoelectric field in QWs. These effects were not observed for the Al-coated regions because the mechanism of PL enhancement should be quite different as we have suggested previously.

本文言語英語
論文番号SCCB31
ジャーナルJapanese journal of applied physics
58
SC
DOI
出版ステータス出版済み - 2019

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 物理学および天文学(全般)

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