Dresden 2017 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 6: Magnetic Instrumentation and Characterization

MA 6.7: Vortrag

Montag, 20. März 2017, 11:00–11:15, HSZ 403

Combining time-resolved Electron Microscopy with in-situ radio-frequency excitation — •Marcel Möller, Nara Rubiano da Silva, Armin Feist, Sascha Schäfer, and Claus Ropers — 4th Physical Institute, Georg-August-University, Göttingen, Germany

Ultrafast Transmission Electron Microscopy (UTEM) is an emerging technique providing simultaneous nanometer spatial and femtosecond temporal resolution. Typically, the structural or electronic processes studied in this approach are triggered by intense optical excitation.

Here, we present our implementation of radio-frequency electrical stimulation in UTEM, synchronized to the train of electron probe pulses. In a first experiment, we quantitatively map the amplitude and phase of localized electrical field distributions at the end of electrical waveguides by the spatial streaking of femtosecond electron pulses. Secondly, we probe the resonant excitation of magnetic vortices by spin-polarized radio-frequency currents using Lorentz-Microscopy with continuous and synchronously-pulsed electron beams. Our work will allow for the time-resolved investigation of numerous resonant and non-resonant phenomena driven in nanostructures with megahertz to terahertz fields and currents.