Optical properties of one- and two-dimensional excitons in m-plane ZnO/MgZnO multiple quantum wells

H. R. Chen, C. Y. Tsai, Y. C. Huang, C. C. Kuo, H. C. Hsu, W. F. Hsieh

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13 引文 斯高帕斯(Scopus)

摘要

Five pairs of ZnO/Zn0.9Mg0.1O multiple quantum wells (MQWs) with fixed barrier thickness of 55 nm and three well widths of 4, 8 and 16 nm have been grown on m-plane sapphires by pulsed laser deposition. Due to 2D quantum confinement with decreasing well width, the emission of excitons bound to the basal-plane stacking faults, which are one-dimensionally confined in MQWs, encounters larger blue shift than that of the near-band edge excitons. Furthermore, remarkably reducing coupling of free excitons with A 1 longitudinal optical phonons is closely correlated with increasing exciton binding energy but enhanced coupling of E 2-low phonons is a result of increasing interaction with the interface phonons with decreasing well width.

原文English
文章編號095105
期刊Journal of Physics D: Applied Physics
49
發行號9
DOIs
出版狀態Published - 2016 2月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 聲學與超音波
  • 表面、塗料和薄膜

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