Detailed model for the In0.18Ga0.82N/GaN self-assembled quantum dot active material for λ = 420 nm emission

Guan Lin Su, Thomas Frost, Pallab Bhattacharya, John Michael Dallesasse, Shun Lien Chuang

Research output: Contribution to journalArticle

Abstract

We present a comprehensive model for In0.18Ga0.82N/GaN self-assembled quantum dot (QD) active material. The strain distribution in the QD structure is studied using linear elastic theory with the application of the shrink-fit boundary condition at the material interface. Subsequent calculations also predict the strain-induced quantum-confined Stark effect (QCSE). Under carrier injection, the overall effect of band bending and charge screening is studied by solving the Schrödinger and Poisson equations self-consistently. The optical gain spectrum of the InGaN/GaN QD active material is calculated based on the electronic states solved from the Schrödinger-Poisson equation, and both the calculated material gain peak and emission wavelength agree well with the measured experimental data.

Original languageEnglish (US)
Pages (from-to)22716-22729
Number of pages14
JournalOptics Express
Volume22
Issue number19
DOIs
StatePublished - Sep 22 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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