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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

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

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Abstract

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

URL: https://doi.org/10.1063/1.3522655

DOI: 10.1063/1.3522655

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