Kundys, D.O., Wells, J.P.R., Andreev, A.D. et al. (6 more authors) (2006) Resolution of discrete excited states in InxGa1−xN multiple quantum wells using degenerate four-wave mixing. Physical review B: Condensed matter and materials physics, 73 (16). 165309. ISSN 1098-0121
Abstract
We report on two pulse, degenerate four-wave mixing DFWM measurements on shallow InxGa1−xN/GaN multiquantum wells MQWs grown on sapphire substrates. These reveal pulse length limited signal decays. We have found a 10:1 resonant enhancement of the DFWM signal at the excitonic transition frequencies which thereby give a sharp discrimination of the discrete excitonic contributions within the featureless distribution seen in absorption spectra. The exciton resonances have peak positions, which yield good overall agreement with a full k·p model calculation for the quantum well QW energy levels and optical transition matrix elements. InxGa1−xN/GaN MQWs generally exhibit strongly inhomogeneously broadened excitation spectra due to indium fluctuation effects; this approach therefore affords a practical method to extract information on the excited excitonic states not available previously.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2006 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. |
Keywords: | GAN; SEMICONDUCTORS |
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) The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 30 May 2022 11:02 |
Last Modified: | 30 May 2022 11:02 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevB.73.165309 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:187459 |