Fundamental Research (Nov 2021)

Epitaxial growth of 2.5-μm quaternary AlInGaN for n-cladding layer in GaN-based green laser diodes

  • Lingrong Jiang,
  • Jianping Liu,
  • Aiqin Tian,
  • Masao Ikeda,
  • Liqun Zhang,
  • Peng Wu,
  • Wei Zhou,
  • Hui Yang

Journal volume & issue
Vol. 1, no. 6
pp. 672 – 676

Abstract

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The ridge morphology, which is related to random atomic step meandering, appears in thick AlInGaN films grown by metal organic chemical vapor deposition on both GaN templates and free-standing GaN substrates; this can be primarily attributed to the in-plane compressive strain in the thick layer. Therefore, a 2.5-μm Al0.08In0.0123GaN film with a slightly tensive strain was grown, with a regular and smooth step-flow morphology; the root mean square deviation of the film (with a size of 5 μm × 5 μm) was 0.56 nm.

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