A5033667436- Spectroscopy and Quantum Chemical Studies
- Advanced Fluorescence Microscopy Techniques
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Quantum Information and Cryptography
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-Matter Interactions and Applications
- Near-Field Optical Microscopy
- Force Microscopy Techniques and Applications
- Terahertz technology and applications
University of Würzburg
2019-2023
We describe a setup for time-resolved photoemission electron microscopy with aberration correction enabling 3 nm spatial resolution and sub-20 fs temporal resolution. The latter is realized by our development of widely tunable (215–970 nm) noncollinear optical parametric amplifier (NOPA) at 1 MHz repetition rate. discuss several exemplary applications. Efficient from plasmonic Au nanoresonators investigated phase-coherent pulse pairs an actively stabilized interferometer. More complex...
We introduce fluorescence-detected pump-probe microscopy by combining a wavelength-tunable ultrafast laser with confocal scanning fluorescence microscope, enabling access to the femtosecond time scale on micrometer spatial scale. In addition, we obtain spectral information from Fourier transformation over excitation pulse-pair delays. demonstrate this new approach model system of terrylene bisimide (TBI) dye embedded in PMMA matrix and acquire linear spectrum as well time-dependent spectra...
Plasmonic resonators can be designed to support spectrally well-separated discrete modes. The associated characteristic spatial patterns of intense electromagnetic hot-spots exploited enhance light-matter interaction. Here, we study the local field dynamics individual within a nanoslit resonator by detecting changes photoelectron emission signal on scale ∼12 nm using time-resolved photoemission electron microscopy (TR-PEEM) and excitation with output from 20 fs, 1 MHz noncollinear optical...
We combine fluorescence-detected pump–probe spectroscopy with confocal scanning fluorescence microscopy to investigate the femtosecond dynamics of single terrylene bisimide molecules.