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Band alignment in the GaNAs/GaAs quantum structures
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0001-7155-7103
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials.ORCID iD: 0000-0002-9840-7364
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0002-6405-9509
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2001 (English)Conference paper, Published paper (Refereed)
Abstract [en]

 The band alignment in the GaN_xAs_1-x/GaAs quantum well (QW) structures with low N composition is studied by employing time-resolved photoluminescence (PL) spectroscopy, PL polarization measurements and optically-detected cyclotron resonance (ODCR) studies. The type I band line-up is concluded based on the following experimental results. Firstly, radiative lifetime of the near band gap PL emission in the GaNAs/GaAs MQW structures is nearly identical to that for the spatially direct PL transitions in the GaNAs epilayers. Secondly, the observed polarization of the PL emission in GaNAs QWs (preferentially along the growth direction) is more consistent with the type I band line-up in the GaNAs/GaAs QWs. Thirdly, since the ODCR peaks arising from the free electrons and free holes in GaAs disappear under resonant excitation of the GaNAs MQWs, the photo-excited holes are spatially confined within the GaNAs layers under the resonant excitation condition.

Place, publisher, year, edition, pages
Bull. Amer. Phys. Soc.: APS , 2001. Vol. 46, 350- p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-45120Local ID: 79755OAI: oai:DiVA.org:liu-45120DiVA: diva2:265982
Conference
American Physical Society Annual March Meeting, 12-16 March 2001, Seattle, Washington, USA
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-03-27Bibliographically approved

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Buyanova, IrinaPozina, GaliaChen, Weimin

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