Ramsay, A.J., Boyle, S.J., Godden, T.M. et al. (8 more authors) (2009) Towards coherent optical control of a single hole spin: rabi rotation of a trion conditional on the spin state of the hole. Solid State Communications, 149 (35-36). pp. 1458-1465. ISSN 0038-1098
Abstract
A hole spin is a potential solid-state q-bit, that may be more robust against nuclear spin induced dephasing than an electron spin. Here we propose and demonstrate the sequential preparation, control and detection of a single hole spin trapped on a self-assembled InGaAs/GaAs quantum dot. The dot is embedded in a photodiode structure under an applied electric field. Fast, triggered, initialization of a hole spin is achieved by creating a spin-polarized electron-hole pair with a picosecond laser pulse, and in an applied electric field, waiting for the electron to tunnel leaving a spin-polarized hole. Detection of the hole spin with picoseconds time resolution is achieved using a second picosecond laser pulse to probe the positive trion transition, where a trion is created conditional on the hole spin being detected as a change in photocurrent. Finally, using this setup we observe a Rabi rotation of the hole-trion transition that is conditional on the hole spin, which for a pulse area of 2 pi can be used to impart a phase shift of pi between the hole spin states, a non-general manipulation of the hole spin. (C) 2009 Elsevier Ltd. All rights reserved.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2009 Elsevier. This is an author produced version of a paper subsequently published in Solid State Communications. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum dots; Spin dynamics; Coherent control |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Miss Anthea Tucker |
Date Deposited: | 02 Sep 2009 13:12 |
Last Modified: | 08 Feb 2013 16:59 |
Published Version: | http://dx.doi.org/10.1016/j.ssc.2009.04.043 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.ssc.2009.04.043 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:9277 |