Dominant factors limiting efficiency of optical spin detection in ZnO-based materials
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, Vol. 92, 092103- p.Article in journal (Refereed) Published
Two dominant factors limiting efficiency of optical spin detection in ZnO-based materials system are identified from time-resolved optical orientation and magneto-optical studies. The first is related to the fundamental band structure of the materials characterized by a weak spin-orbit interaction. It leads to cancellation of circular polarization from the optical transitions between the conduction band and the A and B valence band states, which would otherwise carry the desired information on spin polarization of carriers. The second limiting factor is shown to be efficient carrier/exciton spin relaxation, i.e., about 45-80 ps.
Place, publisher, year, edition, pages
2008. Vol. 92, 092103- p.
IdentifiersURN: urn:nbn:se:liu:diva-44343DOI: 10.1063/1.2885732Local ID: 76366OAI: oai:DiVA.org:liu-44343DiVA: diva2:265205