MBI Staff Member – Personal info
Dr. Wolfgang-Dietrich Engel
wolfgang.engel(at)mbi-berlin.de
+49 30 6392 1337
B1: Electron and Spin Dynamics
Building B, 2.12
Position
- Project Coordinator: 4.3 "Nanoscaled Optics and Samples",
- Member of Project: 3.3 "Transient Structures and lmaging with X-rays"
Research
The Laboratory for Nanoscale Samples and Optics supports several experiments in different scientific projects of the MBI. We develop and produce thin-film sample systems on various substrates with the focus on magnetic multilayers, alloys and metal foils using magnetron sputtering and thermal evaporation. The close integration of deposition, structuring and characterization of these systems with experiments promotes fast feedback on sample performance and rapid development cycles. We collaborate closely with several MBI projects as well as with external cooperation partners to provide custom sample-related services.
To enable new experimental techniques as for example Spin Hall Effect measurements and skyrmion nucleation via high current density, a UV-lithography system is used to create masks, which enables necessary structuring and lift-off processes. Topographic and magnetic characterization is carried out via atomic and magnetic force microscopy (AFM/MFM), electron microscopy (SEM, EDX), X-ray reflectivity and diffraction, Kerr-magnetometry and Kerr-microscopy.
In close cooperation with the central facility for electron microscopy (ZELMI) at the TU Berlin the 3D patterning on a few-micrometer and nanometer scale via electron beam lithography (EBL) and focused ion beam milling (FIB) is carried out.
MBI Publications
- Excitation and detection of coherent nanoscale spin waves via extreme ultraviolet transient gratings Science Advances 10 (2024) eadp6015/1-7
- Coherent x-ray magnetic imaging with 5 nm resolution Optica 11 (2024) 234-237
- Ultrafast opto-magnetic effects in the extreme ultraviolet spectral range Communications Physics 7 (2024) 191/1-8
- Coherent control of magnetization precession by doublepulse activation of effective fields from magnetoacoustics and demagnetization Applied Physics Letters 24 (2024) 102402/1-7
- Exploring the fundamental spatial Limits of Magnetic All-Optical Switching Nano Letters 24 (2024) 6865–6871
- Ultrafast terahertz Stark spectroscopy reveals the excited-state dipole moments of retinal in bacteriorhodopsin PNAS 121 (2024) e2319676121/1-7
- Excitation and detection of coherent nanoscale spin waves via extreme ultraviolet transient gratings Science Advances 10 (2024) /1-6
- Broadband spintronic terahertz source with peak electric fields exceeding 1.5 MV/cm Physical Review Applied 19 (2023) 034018/1-12
- Transient terahertz stark effect: a dynamic probe of electric interactions in polar liquids Journal of Physical Chemistry Letters 14 (2023) 5505–5510
- Pump-probe x-ray microscopy of photo-induced magnetization dynamics at MHz repetition rates Structural Dynamics 10 (2023) 024301/1-9