Sapienza, L., Malein, R.N.E., Kuklewicz, C.E. et al. (7 more authors) (2013) Exciton fine-structure splitting of telecom-wavelength single quantum dots: Statistics and external strain tuning. Physical review B: Condensed matter and materials physics, 88 (15). 155330. ISSN 1098-0121
Abstract
In a charge-tunable device, we investigate the fine-structure splitting of neutral excitons in single long-wavelength (1.1 < λ < 1.3 μm) InGaAs quantum dots as a function of external uniaxial strain. Nominal fine-structure splittings between 16 and 136 μeV are measured and manipulated. We observe varied responses of the splitting to the external strain, including positive and negative tuning slopes, different tuning ranges, and linear and parabolic dependencies, indicating that these physical parameters depend strongly on the unique microscopic structure of the individual quantum dot. To better understand the experimental results, we apply a phenomenological model describing the exciton polarization and fine-structure splitting under uniaxial strain. The model predicts that, with an increased experimental strain tuning range, the fine structure can be effectively canceled for select telecom-wavelength dots using uniaxial strain. These results are promising for the generation of on-demand entangled photon pairs at telecom wavelengths.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 American Physical Society. This is an author produced version of a paper subsequently published in Physical review B: Condensed matter and materials physics. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 09 May 2016 09:29 |
Last Modified: | 16 Nov 2016 09:19 |
Published Version: | http://dx.doi.org/10.1103/PhysRevB.88.155330 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevB.88.155330 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:97403 |