Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers

I. M.E. Butler, W. Li, S. A. Sobhani, N. Babazadeh, I. M. Ross, K. Nishi, K. Takemasa, M. Sugawara, D. T.D. Childs, R. A. Hogg

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
16 Downloads (Pure)

Abstract

We describe a high angle annular dark field scanning transmission electron microscopy study of a self-assembled InAs-GaAs quantum dot (QD) laser sample providing insight into the micro-structure of the QD ensemble. A size distribution anisotropy of the QDs is observed in the two orthogonal (110) planes, and this structural information is used to develop a density of states model for the QD ensemble which is shown to be in strong agreement with a range of optical spectroscopic measurements. This link between the micro-structure and optical properties allows routes to QD device simulation. We go on to discuss how changes to the micro-structure would affect the density of states and hence laser performance.

Original languageEnglish
Article number012105
JournalApplied Physics Letters
Volume113
Issue number1
DOIs
Publication statusPublished - 05 Jul 2018

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers'. Together they form a unique fingerprint.

Cite this