Optical properties and optimization of electromagnetically induced transparency in strained InAs/GaAs quantum dot structures

Publication: Research - peer-reviewJournal article – Annual report year: 2009

View graph of relations

Using multiband k center dot p theory we study the size and geometry dependence on the slow light properties of conical semiconductor quantum dots. We find the V-type scheme for electromagnetically induced transparency (EIT) to be most favorable and identify an optimal height and size for efficient EIT operation. In case of the ladder scheme, the existence of additional dipole allowed intraband transitions along with an almost equidistant energy-level spacing adds additional decay pathways, which significantly impairs the EIT effect. We further study the influence of strain and band mixing comparing four different k center dot p band-structure models. In addition to the separation of the heavy and light holes due to the biaxial-strain component, we observe a general reduction in the transition strengths due to energy crossings in the valence bands caused by strain and band-mixing effects. We furthermore find a nontrivial quantum dot size dependence of the dipole moments directly related to the biaxial-strain component. Due to the separation of the heavy and light holes the optical transition strengths between the lower conduction and upper most valence-band states computed using one-band model and eight-band model show general qualitative agreement, with exceptions relevant for EIT operation.
Original languageEnglish
JournalPhysical Review B (Condensed Matter and Materials Physics)
Publication date2009
Volume80
Issue23
Pages235304
Number of pages9
ISSN1098-0121
DOIs
StatePublished

Bibliographical note

Copyright 2009 American Physical Society

CitationsWeb of Science® Times Cited: 12

Keywords

  • Gallium arsenide, III-V semiconductors, Indium compounds, k, p calculations, Optimisation, Semiconductor quantum dots, Transparency, Valence bands
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

Download statistics

No data available

ID: 4874090