Asymmetric line shape of near-field luminescence spectrum induced by stress in Al2O3

Toru Tomimatsu, Ryo Takigawa

研究成果: ジャーナルへの寄稿記事

抄録

The luminescence spectroscopy of Al2O3 is widely used for sensing the stress in Al2O3based materials. One promising approach that improves the spatial resolution of luminescence spectroscopy is the use of a near-field optical system, which is effective for assessing the localized stress in nano/microsize structural components. Here, we perform the spectral analysis of near-field excited luminescence for stressed Al2O3, which shows an abnormal asymmetry in line shape, which is not observed in a conventional far-field measurement. For analysis, we employ two models that include different effects. The model of stress-gradient-based spectrum broadening fails to account for the asymmetry of the luminescence spectrum. In contrast, the model including vibronic state transition yields good matching of the measured spectrum line shape, indicating that the electron-phonon coupling in Al2O3 affects the appearance of the asymmetric line shape. The magnitude of electron-phonon interaction as well as the effect of the excitation method on the line shape are discussed.

元の言語英語
ページ(範囲)2881-2888
ページ数8
ジャーナルSensors and Materials
30
発行部数12
DOI
出版物ステータス出版済み - 1 1 2018

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line shape
Luminescence
near fields
luminescence
asymmetry
Spectroscopy
Electron-phonon interactions
electron phonon interactions
Optical systems
Spectrum analysis
spectroscopy
spectrum analysis
far fields
spatial resolution
gradients
Electrons
excitation
electrons

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Materials Science(all)

これを引用

Asymmetric line shape of near-field luminescence spectrum induced by stress in Al2O3 . / Tomimatsu, Toru; Takigawa, Ryo.

:: Sensors and Materials, 巻 30, 番号 12, 01.01.2018, p. 2881-2888.

研究成果: ジャーナルへの寄稿記事

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