Ultrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductors

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dc.contributor.advisorKono, Junichiroen_US
dc.creatorWang, Jigangen_US
dc.date.accessioned2009-06-04T08:34:06Zen_US
dc.date.available2009-06-04T08:34:06Zen_US
dc.date.issued2005en_US
dc.description.abstractThis thesis describes magneto-optical processes in ferromagnetic (III,Mn)V semiconductors and their heterostructures induced by femtosecond laser pulses. Two-color ultrafast magneto-optical spectroscopy has been developed, which allows us to observe a rich array of dynamical phenomena that are absent in traditional nonmagnetic semiconductors or metallic/insulating magnets. We isolate several distinct temporal regimes in spin dynamics, interpreting the fast (< 1 ps) dynamics as spin heating through sp-d exchange interaction between photo-carriers and Mn ions while the ∼100 ps component as a manifestation of spin-lattice relaxation. Charge carrier and phonon dynamics were also carefully studied, showing an ultrashort charge lifetime of photoinjected electrons (∼ 2 ps) and propagating coherent acoustic phonon wavepackets with strongly probe energy dependent oscillation period, amplitude and damping.en_US
dc.format.extent148 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS E.E. 2006 WANGen_US
dc.identifier.citationWang, Jigang. "Ultrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductors." (2005) Diss., Rice University. <a href="https://hdl.handle.net/1911/18989">https://hdl.handle.net/1911/18989</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/18989en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectPhysicsen_US
dc.subjectElectromagneticsen_US
dc.subjectCondensed matter physicsen_US
dc.subjectOpticsen_US
dc.titleUltrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductorsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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