000519569 001__ 519569
000519569 005__ 20240927184030.0
000519569 0247_ $$aG:(GEPRIS)137707163$$d137707163
000519569 035__ $$aG:(GEPRIS)137707163
000519569 040__ $$aGEPRIS$$chttp://gepris.its.kfa-juelich.de
000519569 150__ $$aTransfer of Angular Monentum by Circularly Polarized Near Fields$$y2009 - 2017
000519569 371__ $$aProfessor Dr. Hans-Jürgen Butt
000519569 371__ $$aProfessor Dr. Hans-Joachim Elmers
000519569 450__ $$aDFG project G:(GEPRIS)137707163$$wd$$y2009 - 2017
000519569 5101_ $$0I:(DE-588b)2007744-0$$aDeutsche Forschungsgemeinschaft$$bDFG
000519569 550__ $$0G:(GEPRIS)72946949$$aSPP 1391: Ultrafast Nanooptics$$wt
000519569 680__ $$aThe project exploits the fact that a locally rotating electrical near field generated by special nanoantennas has properties similar to a circularly polarized plane light wave. In particular, the photons of the near field possess spin momenta of ± ћ and all effects related to the photon spin (dichroism, optical spin orientation and all-optical magnetisation switching) exist for near fields as well. In the following funding period we will apply the circular polarized near-field for the case of switching the magnetization states of nanoparticles using a plasmon-assisted all-optical switching scheme and for the case of fabrication of spin-polarized field emitters with unprecedented brightness and spin-polarization. The all-optical magnetic switching scheme will be applied to ferromagnetic GdCoFe films that are deposited in-situ in UHV using molecular beam epitaxy. Control of the magnetization switching will be gained by measuring the spin of electrons that are photoemitted by the enhanced near field using spin-polarized photoemission electron microscopy. Field emitters are developed on the basis of strained GaAs multilayer structures providing almost complete spin polarization. The combination of temporal resolution using a pump-probe scheme with spatial resolution gains a deep understanding of the underlying photoemission mechanism.
000519569 909CO $$ooai:juser.fz-juelich.de:945300$$pauthority$$pauthority:GRANT
000519569 909CO $$ooai:juser.fz-juelich.de:945300
000519569 980__ $$aG
000519569 980__ $$aAUTHORITY