Type-I and Type-II Confinement in Quantum Dots: Excitonic Fine Structure

Investor logo
Investor logo

Warning

This publication doesn't include Faculty of Sports Studies. It includes Central European Institute of Technology. Official publication website can be found on muni.cz.
Authors

KŘÁPEK Vlastimil KLENOVSKÝ Petr ŠIKOLA Tomáš

Year of publication 2016
Type Article in Periodical
Magazine / Source ACTA PHYSICA POLONICA A
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://przyrbwn.icm.edu.pl/APP/PDF/129/a129z1ap13.pdf
Doi http://dx.doi.org/10.12693/APhysPolA.129.A-66
Field Solid matter physics and magnetism
Keywords quantum dots; type-II bandalignment; excitonic fine structure; theory
Description e have theoretically studied type-I and type-II confinement in InAs quantum dots with GaAsSb capping layer. The character of the confinement can be adjusted by the Sb content. We have found that upon the transition from type-I to type-II confinement the hole wave functions change the topology from a compact shape to a two-segment shape, resulting in the complex changes in the exciton fine structure splitting with zero values at particular compositions. Additionally, a high exciton radiative recombination probability is preserved even in type-II. This allows to design strongly luminescent quantum dots with naturally low fine structure splitting, which could serve as sources of entangled photon pairs for quantum communication.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info