Effects of crystal orientation on the optical gain characteristics of blue AlInGaN/InGaN quantum-well structures

Seoung Hwan Park, Yong Hee Cho, Mun Bo Shim, Sungjin Kim, Chang Young Park, Y. Eugene Pak, Dhaneshwar Mishra, Seung Hyun Yoo, Keonwook Kang

Research output: Contribution to journalArticle

Abstract

The effects of crystal orientation on the optical gain characteristics of blue AlInGaN/InGaN quantum-well (QW) structures with a reduced internal field were investigated by using the non-Markovian model with many-body effects. The AlInGaN/InGaN system has a larger matrix element than the conventional InGaN/GaN system because the former has a smaller internal field than the latter for relatively small crystal angles. As a result, for QW structures with a relatively small crystal angle (θ = 30°), the AlInGaN/InGaN system is shown to have a much larger optical gain than the conventional InGaN/GaN system. On the other hand, in the case of QW structures with a large crystal angle (θ = 90°), the AlInGaN/InGaN system is shown to have a smaller optical gain than the conventional InGaN/GaN system. Hence, we expect that we can obtain high-efficiency optoelectronic devices by using quaternary AlInGaN QW for relatively small crystal angles.

Original languageEnglish
Pages (from-to)457-461
Number of pages5
JournalJournal of the Korean Physical Society
Volume65
Issue number4
DOIs
Publication statusPublished - 2014 Sep 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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