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Electrical control of fine-structure splitting in self-assembled quantum dots for entangled photon pair creation

Lookup NU author(s): Dr Jonathan Mar



This is the final published version of an article that has been published in its final definitive form by AIP Publishing LLC, 2010.

For re-use rights please refer to the publisher's terms and conditions.


The fine-structure splitting δ1 of the bright exciton doublet in self-assembled InGaAs/GaAs quantum dots is measured as a function of the applied in-plane electric field using time-resolved Kerr rotation. We observe a significant reduction of δ1 with increasing electric field, suggesting a symmetrizing of the electron and hole wave functions. For sufficiently high fields, it is shown that δ1 can be made less than the quantum dot homogeneous linewidth γ, which is calculated using an appropriate model. This may open the way for the electrical control of polarization-entangled photon pair creation through the radiative biexciton cascade.

Publication metadata

Author(s): Mar JD, Xu XL, Sandhu JS, Irvine AC, Hopkinson M, Williams DA

Publication type: Article

Publication status: Published

Journal: Applied Physics Letters

Year: 2010

Volume: 97

Online publication date: 01/12/2010

Date deposited: 15/06/2020

ISSN (print): 0003-6951

ISSN (electronic): 1077-3118

Publisher: AIP Publishing LLC


DOI: 10.1063/1.3522655


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