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dc.contributor.authorMiah, M Idrish
dc.date.accessioned2017-05-03T17:00:20Z
dc.date.available2017-05-03T17:00:20Z
dc.date.issued2009
dc.date.modified2009-12-24T03:05:44Z
dc.identifier.issn0022-3727
dc.identifier.doi10.1088/0022-3727/42/4/045503
dc.identifier.urihttp://hdl.handle.net/10072/28017
dc.description.abstractA time- and polarization-resolved two-photon pump-probe investigation is performed in lightly doped GaAs. We generate spin-polarized electrons in bulk GaAs at various temperatures using right-circularly polarized two-photon excitation and detect them by probing the spin-dependent transmission of the sample. The spin polarization (P) of conduction band electrons, as measured using probe pulses with the same (right) and opposite (left) circular polarization, is measured in dependences of pump-probe delay (?t), lattice temperature (TL), doping density (n) as well as of the excess photon energy ?E2? = planck2? - Eg, where Eg is the band gap energy. P is found to be decayed with ?t and enhanced with the decrease in TL or the increase in n. It is also found that P decreases with the increase in ?E2? and depolarizes rapidly for ?E2? > ?ESO, where ?ESO is the spin-orbit splitting energy. The results demonstrate that due to a much longer absorption depth highly polarized spins can be generated optically by two-photon pumping of bulk semiconductors.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherInstitute of Physics Publishing Ltd.
dc.publisher.placeUnited Kingdom
dc.publisher.urihttps://iopscience.iop.org/article/10.1088/0022-3727/42/4/045503
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto5
dc.relation.ispartofissue4
dc.relation.ispartofjournalJournal of Physics D: Applied Physics
dc.relation.ispartofvolume42
dc.rights.retentionY
dc.subject.fieldofresearchAtomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode020299
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode09
dc.titleTwo-photon spin generation and detection
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.date.issued2009
gro.hasfulltextNo Full Text
gro.griffith.authorMiah, Mohammad I.


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