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
- Application concepts for ultrafast laser-induced skyrmion creation and annihilation Applied Physics Letters 118 (2021) 192403/1-7
- The patterning toolbox FIB-o-mat: Exploiting the full potential of focused helium ions for nanofabrication Beilstein Journal of Nanotechnology 12 (2021) 304-318
- Wide-field magneto-optical microscope to access quantitative magnetization dynamics with femtosecond temporal and sub-micrometer spatial resolution Journal of Applied Physics 130 (2021) 083905/1-9
- Time-resolved near-edge x-ray absorption spectroscopy in the water window and beyond using laboratory-based laser plasma sources X-Ray Lasers 2018 (2020) Proceedings of the 16th International Conference on X-Ray Lasers ICXRL 2018 (2020) 147-154
- Spatial distribution of electric-field enhancement across the gap of terahertz bow-tie antennas Optics Express 28 (2020) 24389-24398
- Distinct spectral response in M-edge magnetic circular dichroism Physical Review B 102 (2020) 100405(R)/1-6
- A tabletop setup for ultrafast helicity-dependent and element-specific absorption spectroscopy and scattering in the extreme ultraviolet spectral range Review of Scientific Instruments 91 (2020) 093001/1-10
- Transient Magnetic Gratings on the Nanometer Scale Structural Dynamics 7 (2020) 054501/1-13
- Element-Specific Magnetization Dynamics of Complex Magnetic Systems Probed by Ultrafast Magneto-Optical Spectroscopy Applied Sciences 10 (2020) 7580/1-15
- Photoinscription of optical microstructures in fused silica with few-cycle pulses SPIE Proceedings Series 11268 (2020) 11268ON/1-6