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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 American Physical Society, 2016.
For re-use rights please refer to the publisher's terms and conditions.
We demonstrate electrical control of the neutral exciton fine-structure splitting in a single InAs/GaAs self-assembled quantum dot by significantly reducing the splitting to near zero through the application of a vertical electric field in the fast electron tunneling regime. This is verified by performing high-resolution photocurrent spectroscopy of the two fine-structure split exciton eigenstates as a function of reverse bias voltage. Using the qubit initialization scheme for a quantum-dot hole spin based on rapid electric-field ionization of a spin-polarized exciton, our results suggest a practical approach towards achieving qubit initialization with near-unity fidelity in the absence of magnetic fields.
Author(s): Mar JD, Baumberg JJ, Xu XL, Irvine AC, Williams DA
Publication type: Article
Publication status: Published
Journal: Physical Review B
Online publication date: 27/01/2016
Acceptance date: 27/01/2016
Date deposited: 15/06/2020
ISSN (print): 2469-9950
ISSN (electronic): 2469-9969
Publisher: American Physical Society
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