A5022869104- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
- Spectroscopy and Laser Applications
- Photoreceptor and optogenetics research
- Porphyrin and Phthalocyanine Chemistry
- 2D Materials and Applications
- Quantum and electron transport phenomena
- Organic Electronics and Photovoltaics
- Strong Light-Matter Interactions
- Photochemistry and Electron Transfer Studies
- Photorefractive and Nonlinear Optics
- Graphene research and applications
- Fullerene Chemistry and Applications
- Circadian rhythm and melatonin
- Quantum Dots Synthesis And Properties
- Insect and Pesticide Research
- Electromagnetic Fields and Biological Effects
- Advanced Fluorescence Microscopy Techniques
- Plant and animal studies
- Perovskite Materials and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Chemical Physics Studies
Carl von Ossietzky Universität Oldenburg
2022-2025
The primary step in the elusive ability of migratory birds to sense weak Earth-strength magnetic fields is supposedly light-induced formation a long-lived, magnetically sensitive radical pair inside cryptochrome flavoprotein located retina these birds. Blue light absorption by flavin chromophore triggers series sequential electron transfer steps across tetradic tryptophan chain towards acceptor. recent express 4 from night-migratory European robin (Erithacus rubecula), ErCry4, and replace...
Transition metal dichalcogenides (TMDs) are quantum confined systems with interesting optoelectronic properties, governed by Coulomb interactions in the monolayer (1L) limit, where strongly bound excitons provide a sensitive probe for many-body interactions. Here, we use two-dimensional electronic spectroscopy (2DES) to investigate and their dynamics 1L-WS
Two-dimensional electronic spectroscopy (2DES) is a powerful method to study coherent and incoherent interactions dynamics in complex quantum systems by correlating excitation detection energies nonlinear experiment. Such can be probed with time resolution limited only the duration of employed laser pulses spectral range defined pulse spectrum. In blue (<500 nm), generation sufficiently broadband ultrashort durations 10 fs or less has been challenging so far. Here, we present 2DES setup...
Since its introduction almost three decades ago, two-dimensional electronic spectroscopy (2DES) has evolved into a mature and powerful technique to reveal the inner workings of quantum systems with high temporal spectral resolution. In general, this can isolate different contributions nonlinear response provides access dynamical pathways system evolution. Such isolation be achieved in experimental geometries. original, fully noncollinear implementation, directional phase matching allows for...
Squaraines are prototypical quadrupolar charge-transfer chromophores that have recently attracted much attention as building blocks for solution-processed photovoltaics, fluorescent probes with large two-photon absorption cross sections, and aggregates circular dichroism. Their optical properties often rationalized in terms of phenomenological essential state models, considering the coupling two zwitterionic excited states to a neutral ground state. As result, transitions lowest S1...
In recent years, research has emphasized the significant influence of vibronic couplings on charge separation in donor–acceptor molecules and thin films. Diaminoterephthalates (DATs), known for their versatile optical electronic properties, are intriguing donor materials. Efficient, vibronically assisted DAT-acceptor dyads been suggested. This study therefore investigates dynamics DAT-linker-fullerene a polar solvent by using transient absorption spectroscopy. The results demonstrate...
The coherent coupling between electronic excitations and vibrational modes of molecules largely affects the optical charge transport properties organic semiconductors molecular solids. To analyze these couplings by means ultrafast spectroscopy, highly ordered crystalline films with large domains are particularly suitable because can be addressed individually, hence allowing azimuthal polarization-resolved measurements. Impressive examples this thin perfluoropentacene (PFP) molecules, which...
Ultrafast spectroscopy provides unique access to the coherent dynamics of atomic, molecular, and solid state quantum systems. A most powerful, yet experimentally challenging tool for this is two-dimensional electronic (2DES), allowing isolate excitation pathways selectively probe incoherent couplings by controlling phase ultrashort pulses that interact with system. Its experimental implementation can in principle greatly be simplified employing inherently stable birefringent in-line...
The separation of incoherent emission signals from coherent light scattering often poses a challenge in (time-resolved) microscopy or excitation-emission spectroscopy. While spectro-microscopy with narrowband excitation this is commonly overcome using spectral filtering, it less straightforward when broadband Fourier-transform techniques that are now becoming commonplace in, e.g., single molecule ultrafast nonlinear Here we show such readily achieved highly stable common-path interferometers...
Selecting distinct quantum pathways in two-dimensional electronic spectroscopy (2DES) can give particularly deep insights into coherent and incoherent interactions dynamics various materials. This includes isolating rephasing non-rephasing for conventional single-quantum 2DES, but also the ability to record double- zero-quantum spectra. Such advanced 2DES schemes usually require phase-cycling when performed a partially or fully collinear geometry. A simple effective implementation of...
Selecting distinct quantum pathways in two-dimensional electronic spectroscopy (2DES) can give particularly deep insights into coherent and incoherent interactions dynamics various materials. This includes isolating rephasing non-rephasing for conventional single-quantum 2DES, but also the ability to record double- zero-quantum spectra. Such advanced 2DES schemes usually require phase-cycling when performed a partially or fully collinear geometry. A simple effective implementation of...
Selecting distinct quantum pathways in two-dimensional electronic spectroscopy (2DES) can give particularly deep insights into coherent and incoherent interactions dynamics various materials. This includes isolating rephasing non-rephasing for conventional single-quantum 2DES, but also the ability to record double- zero-quantum spectra. Such advanced 2DES schemes usually require phase-cycling when performed a partially or fully collinear geometry. A simple effective implementation of...
The primary step in the elusive ability of migratory birds to sense weak Earth-strength magnetic fields is supposedly light-induced formation a long-lived, magnetically sensitive radical pair inside cryptochrome flavoprotein located retina these birds. Blue light absorption by flavin chromophore triggers series sequential electron transfer steps across tetradic tryptophan chain towards acceptor. recent express 4 from night-migratory European robin (Erithacus rubecula), ErCry4, and replace...