Sökning: onr:"swepub:oai:DiVA.org:liu-69808" > Circularly polarize...
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000 | 03207naa a2200337 4500 | |
001 | oai:DiVA.org:liu-69808 | |
003 | SwePub | |
008 | 110808s2011 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-698082 URI |
024 | 7 | a https://doi.org/10.1063/1.35998532 DOI |
040 | a (SwePub)liu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Moskalenko, Evgeniiu Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan4 aut0 (Swepub:liu)evgmo15 |
245 | 1 0 | a Circularly polarized emission from ensembles of InAs/GaAs quantum dots |
264 | 1 | b American Institute of Physics,c 2011 |
338 | a electronic2 rdacarrier | |
500 | a Original Publication: Evgenii Moskalenko, L.A. Larsson and Per-Olof Holtz, Circularly polarized emission from ensembles of InAs/GaAs quantum dots, 2011, Journal of Applied Physics, (110), 1, 013510. http://dx.doi.org/10.1063/1.3599853 Copyright: American Institute of Physics http://www.aip.org/ | |
520 | a We present a low-temperature micro-photoluminescence (mu-PL) study of ensembles of InAs/GaAs quantum dots (QDs) with respect to its circular polarization (rho(c)) for a manifold of experimental conditions such as single or dual laser excitation, different excitation energies (h upsilon(ex)), varying excitation powers (P(ex)) of both lasers, and with or without an external magnetic field (B(ext)). It is demonstrated that an essential rho(c) (less than= 40%) could be recorded depending on P(ex), even at B(ext) = 0 for h upsilon(ex) exceeding the PL energy of the wetting layer (E(WL)), while rho(c) remains negligible for h upsilon(ex) less than E(WL). To explain the data obtained, a model is developed according to which a nuclear magnetic field (B(N)) is created in the QDs by spin-polarized electrons. The B(N) plays a crucial role in the preservation of the electron spin, which otherwise effectively relaxes due to the presence of the anisotropic electron-hole exchange interaction (omega(ex)). The application of an additional infra-red laser gives rise to a population of excess holes in the QDs, thus producing positively charged excitons. In this case, omega(ex) = 0 and accordingly, rho(c) approximate to 40% at B(ext) = 0 is recorded, even for excitation with h upsilon(ex) less than E(WL). | |
653 | a TECHNOLOGY | |
653 | a TEKNIKVETENSKAP | |
700 | 1 | a Larsson, L.A.u Linköpings universitet,Tekniska högskolan,Halvledarmaterial4 aut |
700 | 1 | a Holtz, Per-Olofu Linköpings universitet,Halvledarmaterial,Tekniska högskolan4 aut0 (Swepub:liu)perho67 |
710 | 2 | a Linköpings universitetb Institutionen för fysik, kemi och biologi4 org |
773 | 0 | t Journal of Applied Physicsd : American Institute of Physicsg 110:1, s. 013510-q 110:1<013510-x 0021-8979x 1089-7550 |
856 | 4 | u https://liu.diva-portal.org/smash/get/diva2:433555/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print |
856 | 4 | u http://liu.diva-portal.org/smash/get/diva2:433555/FULLTEXT01 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69808 |
856 | 4 8 | u https://doi.org/10.1063/1.3599853 |
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