Journal article
Fine structure splitting cancellation in highly asymmetric InAs/InP droplet epitaxy quantum dots
Physical review. B, Vol.109(20), L201405
05/15/2024
DOI: 10.1103/physrevb.109.l201405
Abstract
We find the fine structure splitting (FSS) of a single exciton, which splits its degenerate ground-state manifold into singlets, nearly vanishes in highly asymmetric quantum dots (QDs) due to the cancellation of splitting effects with markedly different origin. The dots simulated are those that emerge on top of etch pits through the droplet epitaxy growth process; these etch pit dots break square (𝐶4𝑣) spatial symmetry, which has been previously associated with small FSS. Configuration interaction calculations predict a vanishing FSS at a specific finite etch pit displacement from the center of the dot, for a structure far from square symmetry. We thus predict that highly asymmetric QDs may still display negligible FSS, providing avenues for high-fidelity generation of indistinguishable, polarization entangled photon pairs on demand.
Details
- Title: Subtitle
- Fine structure splitting cancellation in highly asymmetric InAs/InP droplet epitaxy quantum dots
- Creators
- N. R.S. Van Venrooij - University of IowaA. R. Da Cruz - University of Iowa, Physics and AstronomyR. S.R. Gajjela - Eindhoven University of TechnologyP. M. Koenraad - Eindhoven University of TechnologyCraig E. Pryor - University of IowaMichael E. Flatté - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physical review. B, Vol.109(20), L201405
- DOI
- 10.1103/physrevb.109.l201405
- ISSN
- 2469-9950
- eISSN
- 2469-9969
- Language
- English
- Date published
- 05/15/2024
- Academic Unit
- Physics and Astronomy; Electrical and Computer Engineering
- Record Identifier
- 9984635160102771
Metrics
1 Record Views