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X-WR-CALNAME:GRK 2905 - Ultrafast Nanoscopy
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260130T140000
DTEND;TZID=Europe/Berlin:20260130T150000
DTSTAMP:20260413T065137
CREATED:20250918T093152Z
LAST-MODIFIED:20260326T162142Z
UID:1788-1769781600-1769785200@grk2905.de
SUMMARY:RTG Colloquium:Prof. Dr. Renske van der Veen
DESCRIPTION:Fast electrons and hard X-rays for unraveling atomic-scale dynamics in light-energy conversion\n\n\n\nDepartment Atomic-Scale Dynamics in Light-Energy Conversion\, Helmholtz Zentrum Berlin \n\n\n\nThe increasing demand for renewable and low-cost energy motivates intensive research aimed at characterizing and optimizing materials that can efficiently convert (sun) light into usable energy in the form of electricity or chemical fuels. Conventional characterization techniques either lack the spatial resolution necessary to resolve individual atoms\, or they lack the temporal resolution required to capture structural rearrangements as they evolve. Our group develops complementary X-ray and electron-based tools to visualize light-induced processes in materials on atomic length and time scales. In this talk I will introduce you to the techniques of ultrafast/time-resolved X-ray spectroscopy and transmission electron microscopy and provide several examples of how these techniques can be used in the fields of solar energy and catalysis. \n\n\n\n \n\n\n\n \n\n\n\n \n\n\n\nVenue: RUN Auditorium
URL:https://grk2905.de/event/grk-colloquiumprof-dr-renske-van-der-veen/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2026/01/VanDerVeen.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260123T140000
DTEND;TZID=Europe/Berlin:20260123T150000
DTSTAMP:20260413T065137
CREATED:20250918T092750Z
LAST-MODIFIED:20260326T162155Z
UID:1784-1769176800-1769180400@grk2905.de
SUMMARY:RTG Colloquium:Dr. Anna Rosławska
DESCRIPTION:Single-molecule optics with atomic precision\n\n\n\nAtomic Scale Optics\, Max Planck Institute for Solid State Research\, Stuttgart\, Germany \n\n\n\nLuminescence\, photosynthesis\, and energy harvesting rely on processes originating at the spatial scale of individual molecules. Investigating the details of these mechanisms requires reaching subnm precision in optics\, which becomes possible by combining optical spectroscopy with scanningprobe microscopy. In my talk\, I will discuss how atomic-scale optics can be used to study the optical properties of single molecules and to drive photochemistry with sub-nm precision. \n\n\n\n \n\n\n\nVenue: RUN Auditorium
URL:https://grk2905.de/event/grk-colloquium-dr-anna-m-roslawska/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/webp:https://grk2905.de/wp-content/uploads/2025/09/anna_maria_roslawska-e1758187610182.webp
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260116T140000
DTEND;TZID=Europe/Berlin:20260116T150000
DTSTAMP:20260413T065137
CREATED:20250918T092416Z
LAST-MODIFIED:20260326T162207Z
UID:1781-1768572000-1768575600@grk2905.de
SUMMARY:RTG Colloquium: Prof. Dr. Rudolf Bratschitsch
DESCRIPTION:Title: Magnonic waveguide networks \n\n\n\nUltrafast solid-state quantum optics and nanophotonics\, Physical Institute\, University of Münster\, Münster\, Germany \n\n\n\nSpin waves (magnons) have emerged as a promising platform for next-generation physical computing. However\, current experimental realizations of magnonic waveguides suffer from limited spin-wave propagation lengths and inefficient dispersion tuning capabilities. In my talk\, I will present low-loss magnonic waveguides in a thin magnetic insulator film\, fabricated with a new maskless silicon ion implantation technique. We demonstrate a large-scale magnonic network\, paving the way for wafer-scale magnonic integrated circuits. \n\n\n\n \n\n\n\n \n\n\n\nVenue: RUN Auditorium
URL:https://grk2905.de/event/grk-colloquium-prof-dr-rudolf-bratschitsch/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/09/bratschitsch-e1758187435116.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251202T141500
DTEND;TZID=Europe/Berlin:20251202T151500
DTSTAMP:20260413T065137
CREATED:20251106T152233Z
LAST-MODIFIED:20260326T162238Z
UID:1845-1764684900-1764688500@grk2905.de
SUMMARY:RTG Colloquium:Prof. Dr. Jim Freericks
DESCRIPTION:How to describe pump-probe experiments in quantum materialsGeorgetown University\, Washington\, USA \n\n\n\n \n\n\n\nI will describe both the challenges\, and how to address them\, when theoretically modelling ultrafast pump-probe experiments in strongly correlated materials and in materials with strong electron-phonon coupling. After providing an introduction\, I will focus on three case studies: (i) examining the response at picosecond times of charge-density waves with ultrashort pulses that drive the electrons; (ii) examining the response on femtosecond times for nonresonant electronic Raman scattering; and (iii) examining how one can measure correlated charge dynamics in f-electronsystems using x-ray photoemission spectroscopy and x-ray absorption spectroscopy. \n\n\n\n \n\n\n\n \n\n\n\nVenue: H34
URL:https://grk2905.de/event/grk-colloquium-prof-dr-jim-freericks-2/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/11/Jim_freericks.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251121T140000
DTEND;TZID=Europe/Berlin:20251121T150000
DTSTAMP:20260413T065137
CREATED:20250918T091414Z
LAST-MODIFIED:20260326T162255Z
UID:1774-1763733600-1763737200@grk2905.de
SUMMARY:RTG Colloquium:Prof. Dr. Miriam Vitiello
DESCRIPTION:Detector-less near-field quantum nanoscopy in the far-infraredNEST\, CNR – Istituto Nanoscienze and Scuola Normale Superiore\, Pisa\, Italy \n\n\n\nNear-field nanoscopy at terahertz (THz) frequencies (wavelength range\, 3 mm – 3 µm) enables studies of objects over a large span of scales – from 300 µm to the nanometer scale – and disciplines\, from physics to biological science. The talk will show the potential of a series of near-field nanoimaging approaches that\, while exploiting the same core building block (a detector-less QCL-based nanoscope)\, rely on different physical mechanism for imaging reconstruction. I will also highlight their potential for tracing the realspace propagation of THz-frequency polaritons in isotropic and anisotropic nanomaterials and meta-elements. \n\n\n\n \n\n\n\n \n\n\n\n \n\n\n\nVenue: RUN Auditorium
URL:https://grk2905.de/event/grk-colloquium-prof-dr-miriam-vititello/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/webp:https://grk2905.de/wp-content/uploads/2025/09/MiriamVitiello-e1758186925309.webp
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250711T140000
DTEND;TZID=Europe/Berlin:20250711T160000
DTSTAMP:20260413T065137
CREATED:20250526T081439Z
LAST-MODIFIED:20260326T162438Z
UID:1673-1752242400-1752249600@grk2905.de
SUMMARY:RTG Colloquium:Ulrich Höfer
DESCRIPTION:Formation of Floquet-Bloch bands in solidsPeriodic driving of electrons in solids by strong light fields can lead to the formation of Floquet- Bloch bands\, i.e.\, sidebands separated by multiples of the driving frequency. The induced change of the electronic structure is one route to materials design by light. In 2009\, Oka proposed that circularly polarized light can turn the semimetal graphene into a Chern insulator in this way. While transport experiments could so far not provide compelling evidence for the predicted anomalous Hall effect\, time-resolved photoemission has clearly demonstrated the formation of Floquet-Bloch bands for several materials\, including graphene. Moreover\, with subcycle resolution\, it has become possible to reveal their ultrafast build-up. These experiments show that Floquet sidebands emerge after a single optical cycle\, concurrently with intraband acceleration of the electrons.Venue: RUN auditorium
URL:https://grk2905.de/event/grk-colloquiumulrich-hofer/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/05/Hoefer-edited.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250704T140000
DTEND;TZID=Europe/Berlin:20250704T160000
DTSTAMP:20260413T065137
CREATED:20250526T081344Z
LAST-MODIFIED:20260326T162518Z
UID:1671-1751637600-1751644800@grk2905.de
SUMMARY:RTG Colloquium:Jan Vogelsang & Gerti Beliu
DESCRIPTION:2 pmFrom single‐molecule fluorescence spectroscopy to (fast) super‐resolution microscopySuper‐resolution (SR) microscopy has revolutionized far‐field fluorescence imaging by overcoming the diffraction limit of light. The technique relies fundamentally on the ability to detect single fluorescent molecules\, and the first part will focus on achieving this\, which requires carefully optimized technical and photophysical needs\, including the manipulation of fluorophore behavior through photoinduced redox reactions. The second part will focus on a novel approach using DNA origami nanoantennas to dramatically enhance fluorescencesignals in single‐molecule experiments. Such nanoantennas can increase the fluorescence of single molecules by an order of magnitude\, which increases the time resolution and facilitates the observation of ultrafast processes such as thediffusive barrier crossing events between two potential energy minima in disordered proteins. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nDr. Jan VogelsangUniversity of RegensburgInstitute of Experimental and Applied Physics \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n3 pmClick. Tag. Image –A Hitchhiker’s Guide to Molecular BioimagingSuper‐resolution microscopy holds the promise of visualizing molecular processes in cells with nanometer precision. However\, realizing this potential requires labeling strategies that are not only bright and site‐specific\, but also biologically orthogonal. Many commonly used labeling approaches interfere with protein function or fail to access conformationally restricted or sterically masked epitopes in live‐cell environments. In our work\, we develop and apply biochemical labeling strategies that combine genetic code expansion\, bioorthogonal click chemistry\, and fluorogenic dyes to overcome these limitations. By minimizing linkage errors and enabling stoichiometric labeling under native conditions\, we aim to push the limits of resolution\, specificity\, and functional integrity in molecular imaging. This talk will provide an overview of our toolbox\, recent applications\, and future directions for nanoscale imaging of proteins in living systems.Venue: RUN auditorium \n\n\n\n\n\n\n\n\n\n\n\n\n\nProf. Dr. Gerti BeliuUniversity of RegensburgInstitute of Pharmacy
URL:https://grk2905.de/event/grk-colloquiumjan-vogelsang-gerti-beliu/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2025/05/Vogelsang_Beliu.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250606T140000
DTEND;TZID=Europe/Berlin:20250606T160000
DTSTAMP:20260413T065137
CREATED:20250526T081056Z
LAST-MODIFIED:20260326T162538Z
UID:1667-1749218400-1749225600@grk2905.de
SUMMARY:RTG Colloquium:Franz Giessibl & Sabine Maier
DESCRIPTION:Venue: Run auditorium2 pmAtomic Force Microscopy (AFM)This tutorial presentation builds on Jascha Repp’s introduction to scanning tunneling microscopy (STM) six months ago. STM relies on the monotonic exponential decay of the tunneling current with distance. This decay at a factor of ten per Angstrom distance reduction ensures a high spatial resolution and a relatively simple implementation of STM. AFM is harder\, as the forces between a sharp tip and a sample often have strong long-range van-der-Waals compo-nents\, the forces are non-monotonic and the experimental measurement of small forces measurements (nN and below) is more difficult than the measurement of tunnling currents (nA and below). Frequency modulation AFM with stiff self-sensing cantilevers (qPlus sensors) provides a powerful solution that even obtains higher spatial resolution than STM. \n\n\n\n\n\n\n\n\n\n\n\n\n\nProf. Dr. Franz J. GießiblUniversity of Regensburg \n\n\n\n\n\n\n\n\n\n\n\n3 pmBottom-up fabrication and electronic structure of atomically precise low-dimensional materialsThe ability to engineer atomically precise low-dimensional structures with tailored electronic properties is essential for the development of future electronic and quantum materials. This presentation focuses on molecular architectures constructed through bottom-up surface reactions. By combining scanning probe microscopy with density-functional theory\, we investigate their atomic-scale structure and electronic characteristics. Recent advances in the synthesis and characterization of surface-supported 2D polymers and nanographenes illustrate how structural precision enables electronic property control. These studies offer fundamental insights into the design and functionality of low-dimensional materials. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\nProf. Dr. Sabine MaierFAU Erlangen-Nürnberg
URL:https://grk2905.de/event/grk-kolloquiumfranz-giessibl-sabine-maier/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2025/05/Giessibl_Maier.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250109T140000
DTEND;TZID=Europe/Berlin:20250109T150000
DTSTAMP:20260413T065137
CREATED:20241205T085305Z
LAST-MODIFIED:20250109T110521Z
UID:1538-1736431200-1736434800@grk2905.de
SUMMARY:RUN Colloquium: Prof. Dr. Giulio Cerullo
DESCRIPTION:2D semiconductors: a platform for ultrafast photonics \n\n\n\n\n\nDipartimento di Fisica\, Politecnico di Milano\, Piazza Leonardo da Vinci 32\, 20133\, Milano\, Italy \n\n\n\nLayered materials are solids consisting of crystalline sheets with strong in-plane covalent bonds and weak van der Waals out-of-plane interactions. These materials can be easily exfoliated to a single layer\, obtaining two-dimensional (2D) materials with radically novel physico-chemical characteristics compared to their bulk counterparts. The field of 2D materials began with graphene and quickly expanded to include semiconducting transition metal dichalcogenides(TMDs). 2D semiconductors exhibit very strong light-matter interaction and exceptionally intenseand ultrafast nonlinear optical response\, enabling a variety of novel applications in optoelectronics and photonics. Furthermore\, stacking 2D materials into heterostructures (HS) offers unlimited possibilities to design new materials tailored for applications. In such HS the electronic structure of the individual layers is well retained because of the weak interlayer van der Waals coupling. Nevertheless\, new physical properties and functionalities arise beyond those of their constituent blocks\, depending on the type\, the stacking sequence and the twist angle of the layers. This talk will review our recent studies on the ultrafast non-equilibrium optical response of TMDs and their HS. Using high time resolution ultrafast transient absorption (TA) spectroscopy\, we monitor the ultrafast onset of exciton formation in TMDs and the dynamics of strongly coupled phonons. Using helicity resolved TA spectroscopy we time-resolve intravalley spin-flip processes. In HS of TMDs we measure ultrafast interlayer hole transfer\, interlayer exciton formation and use two-dimensional electronic spectroscopy to dissect interlayer electron and hole transfer processes. We also show that strong exciton nonlinear interactions can lead to a complete quenching of the Rabi splitting in TMD-based microcavities. The demonstrated ultrafast switching between the strong and weak coupling regimes paves the way for the development of TMD based high speed all-optical circuits and neural networks. \n\n\n\n \n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\nVenue: RUN auditorium \n\n\n\nHost: GRK 2905\, Rupert Huber
URL:https://grk2905.de/event/professor-dr-giulio-cerullo-2d-semiconductors-a-platform-for-ultrafast-photonics/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/12/images.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T151500
DTEND;TZID=Europe/Berlin:20241213T160000
DTSTAMP:20260413T065137
CREATED:20241205T084734Z
LAST-MODIFIED:20241205T085727Z
UID:1533-1734102900-1734105600@grk2905.de
SUMMARY:Dr. Francesco Intravaia: Unpacking Electromagnetic Quantum Fluctuation-Induced Interactions
DESCRIPTION:Humboldt Universität zu BerlinFluctuations are ubiquitous in both classical and quantum realms\, underpinning a wide range of phenomena across physics\, from biophysics and chemistry to gravity and cosmology. In the ongoing race toward miniaturization\, interest in electromagnetic quantum fluctuation-induced interactions has surged—not only for foundational insights but also for technological applications. While many of these interactions are negligible at macroscopic scales\, they become crucial at microscopic scales\, posing both challenges and opportunities for modern quantum technologies. Paradigmatic examples include van der Waals and Casimir interactions\, which can be either advantageous or disruptive in the design of microscopicdevices.The study of these phenomena draws on a highly interdisciplinary background\, merging advances in nonequilibrium physics\, quantum electrodynamics\, atomic physics\, and condensed matter physics. Unpacking electromagnetic quantum fluctuation-induced interactions opens up new perspectives\, deepening our understanding of the underlying physics and paving the way for future advancements in the field. \n\n\n\n \n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\nVenue: RUN auditorium \n\n\n\nHost: GRK 2905\, Rupert Huber
URL:https://grk2905.de/event/dr-francesco-intravaia-unpacking-electromagnetic-quantum-fluctuation-induced-interactions/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/10/Intravaia_Francesco_img.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241213T140000
DTEND;TZID=Europe/Berlin:20241213T150000
DTSTAMP:20260413T065137
CREATED:20241001T144447Z
LAST-MODIFIED:20241209T082304Z
UID:1430-1734098400-1734102000@grk2905.de
SUMMARY:Prof. Dr. Maria Chekhova: Generation of entangled photons in ‘flat’ optics
DESCRIPTION:Bright squeezed vacuum and its applicationsin strong-field physics \n\n\n\n\n\n\n\n \n\n\n\n\n\nMax-Planck-Institut für die Physik des Lichts\, ErlangenStrongly pumped parametric down-conversion produces a state of light that\, on the one hand\, is as intense as laser light\, and on the other hand\, has pronounced quantum features. This state\, known as bright squeezed vacuum\, has zero mean electric field and consists only of quantum fluctuations\, enhanced or suppressed on a subcycle scale. Recently\, we have used this state to drastically modify the dynamics of strong-field effects\, such as non-perturbative harmonics generation and electron ejection from needle tips. \n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\nVenue: RUN auditorium \n\n\n\nHost: GRK 2905\, Rupert Huber
URL:https://grk2905.de/event/grk-colloquium-prof-dr-maria-chekhova-dr-francesco-intravaia/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2024/10/grafik-1-e1733389244873.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241115T140000
DTEND;TZID=Europe/Berlin:20241115T150000
DTSTAMP:20260413T065137
CREATED:20241001T133813Z
LAST-MODIFIED:20260326T162953Z
UID:1420-1731679200-1731682800@grk2905.de
SUMMARY:RTG Colloquium: Complexity with a purpose: Long range collective vibrations steering protein conformational change
DESCRIPTION:14:00 h \n\n\n\n\n\n\n\n\n\n\n\nRUN auditorium \n\n\n\nProf. Dr. Andrea Markelz \n\n\n\nUniversity at Buffalo College of Arts and Sciences \n\n\n\n\n\n\n\nThe evolutionary advantage of the large-scale structure of proteins surrounding the biochemically active site is not readily apparent. It has been speculated that the structural dynamics provide long-range control of access to the active site. Through anisotropic terahertz micro-spectroscopy (ATM) measurements we find that the photo initiation of orange carotenoid protein’s (OCP) photocycle is accompanied with switching in the protein structural vibrations\, before long range structural change can occur. The ATM spectral changes are reversible and calculations reproduce the changes in ATM spectra\, with features red shifted from the measurements. Averaging the vibrational displacement autocorrelation matrix over the spectrally relevant region and thermally occupied starting configurations finds changes in the correlations for residues 80-113 with residues 151-164\, and for residues 280-291 with residues 265-275. These regions are those previously predicted to be involved in the structural modification necessary for a critical step in the photocycle. The results provide the first evidence that structural vibrational change can actuate conformational change for function.
URL:https://grk2905.de/event/grk-colloquium-prof-dr-andrea-markelz/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/10/Markelz-scaled-e1727789922881.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241108T150000
DTEND;TZID=Europe/Berlin:20241108T160000
DTSTAMP:20260413T065137
CREATED:20241106T094030Z
LAST-MODIFIED:20241108T134915Z
UID:1471-1731078000-1731081600@grk2905.de
SUMMARY:Colloquium: Photopharmacology Across Time and Space: Molecular Insights via X-ray Free Electron Lasers
DESCRIPTION:RUN auditorium \n\n\n\nDr. Jörg Standfuss  \n\n\n\nLab. for Biomolecular Research\, PSI Center for Life Sciences\, Switzerland \n\n\n\nStructural biology has been critical for our understanding of how proteins work on the molecular level. However\, resolving the temporal evolution of biological macromolecules in response to activating stimuli—such as the binding of small molecular ligands or drug molecules—remains a challenge. In recent years\, our research group has leveraged X-ray Free Electron Laser facilities to experimentally investigate how retinal-binding rhodopsins\, acting as pumps\, channels\, or light sensors\, are activated at the atomic level across a wide range of time scales. \n\n\n\n\n\n\n\n\n\nf \n\n\n\n\nSee announcement\n\n\n\n\n\n\nIn our latest experiments at the Swiss X-ray Free Electron Laser\, we explored how photoactive azobenzene compounds\, mimicking retinal\, can be used to trigger protein dynamics for structural studies. My presentation will focus on the dissociation dynamics of the photopharmacological drug candidate azo-combretastatin A4 from tubulin\, capturing events from the initial photochemical reaction in the femtosecond range\, through the disruption of high-affinity protein-ligand interactions in nanoseconds\, adaptation of the binding pocket in microseconds\, and the eventual release of the compound in milliseconds. I will discuss the relevance of these findings for our understanding of how anti-cancer drugs destabilize the microtubule network. Furthermore\, I will propose the use of azobenzene-based photoswitches to trigger G protein-coupled receptors and other pharmacologically relevant targets in time-resolved structural biology experiments.
URL:https://grk2905.de/event/colloquium-photopharmacology-across-time-and-space-molecular-insights-via-x-ray-free-electron-lasers/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/09/Jorg-Standfuss-e1730886513313.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241025T150000
DTEND;TZID=Europe/Berlin:20241025T150000
DTSTAMP:20260413T065137
CREATED:20241001T133103Z
LAST-MODIFIED:20260326T163023Z
UID:1395-1729868400-1729868400@grk2905.de
SUMMARY:RTG Colloquium: Prof. Dr. Ido Kaminer
DESCRIPTION:15:00 h \n\n\n\nProf. Dr. Ido Kaminer \n\n\n\nRegensburg center for ultrafast nanoscopy \n\n\n\n\n\n\n\n\n\n\n\n\n\nDownload Annnouncement
URL:https://grk2905.de/event/grk-colloquium-tba-2/
CATEGORIES:Colloquium,Special lecture series
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/10/IdoKaminer.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240712T141500
DTEND;TZID=Europe/Berlin:20240712T163000
DTSTAMP:20260413T065137
CREATED:20240625T133500Z
LAST-MODIFIED:20260326T163043Z
UID:1324-1720793700-1720801800@grk2905.de
SUMMARY:RTG Colloquium:Till Rudack / Shinjae Nam
DESCRIPTION:14:15Prof. Dr. Till Rudack Strukturelle Bioinformatik\, Universität Regensburg \n\n\n\n\n\n\n\n\n\n\n\n\n\n15:30Shinjae NamLehrstuhl für Quanten- und Nanowissenschaften F. Gießibl\, Universität Regensburg
URL:https://grk2905.de/event/grk-kolloquiumtill-rudack-shinjae-nam/
LOCATION:RUN Auditorium (1st floor)
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2024/06/RudackNamCrop.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240705T141500
DTEND;TZID=Europe/Berlin:20240705T154500
DTSTAMP:20260413T065137
CREATED:20240613T132148Z
LAST-MODIFIED:20240626T101240Z
UID:1270-1720188900-1720194300@grk2905.de
SUMMARY:RUN Colloquium:Plasmonic Twistronics: Ultrafast Vector Microscopy
DESCRIPTION:Location: H 51 \n\n\n\nHere we introduce a new technique\, time-resolved vector microscopy\, that enables us to compose entire movies on a sub-femtosecond time scale and a 10 nm scale of the electric field vectors of surface plasmon polaritons. Depending on the shape and geometrical phase\, in combination with the helicity of the excitation beam\, topological plasmonic quasiparticles are created: skyrmions\, merons\, as well as quasicrystalline excitations. We observe their complete field vector dynamics at subfemtosecond time resolution. We expand the concept also to plasmonic twistronics\, where we can identify skyrmion bags. \n\n\n\n\n\n\n\nHarald Gießen
URL:https://grk2905.de/event/run-colloquiumplasmonic-twistronics-ultrafast-vector-microscopy/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/06/Giessen.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240705T103000
DTEND;TZID=Europe/Berlin:20240705T120000
DTSTAMP:20260413T065137
CREATED:20240613T131742Z
LAST-MODIFIED:20260326T163129Z
UID:1265-1720175400-1720180800@grk2905.de
SUMMARY:RTG Colloquium: Accurate theoretical methods for structural characterization of complex materials
DESCRIPTION:Spectroscopy is crucial for establishing structure-property relationships as it provides detailed information about the molecular composition and electronic structure of materials. This data is essential for correlating specific structural features with material properties\, thereby guiding the design and optimization of new materials. I will discuss our recent advances in accurately predicting core-level and vibrational spectra of complex materials. For core-level spectroscopy\, we developed highly accurate but computationally expensive methods based on Green’s function theory in the GW approximation. Calculations for amorphous materials\, which require computational models with several hundred atoms\, were enabled by devising new efficient algorithms and combining these methods with machine-learning approaches. In addition\, I will discuss computational approaches to vibrational spectroscopy that not only allow for the structural characterization of the final layered framework materials but also enable the monitoring of synthesis progress. \n\n\n\n\n\n\n\nDr. Dorothea Golze
URL:https://grk2905.de/event/grk-colloquium-by-dorothea-golze/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/webp:https://grk2905.de/wp-content/uploads/2024/06/dorothea2021-e1718807615330.webp
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240628T141500
DTEND;TZID=Europe/Berlin:20240628T154500
DTSTAMP:20260413T065137
CREATED:20240613T131705Z
LAST-MODIFIED:20260326T163149Z
UID:1263-1719584100-1719589500@grk2905.de
SUMMARY:RTG Colloquium: Excitations in condensed matter:From theory to real materials II
DESCRIPTION:The second lecture on excitations in condensed matter will cover electronic excitations in semiconductors and dielectrics\, where the electron-hole interaction in the electronically excited state\, the exciton\, is key. We will explain how the electron-hole interaction arises from Hartree-Fock theory and discuss the limitations of time-dependent density functional theory and Hartree-Fock for the study of excitons. The lecture will then introduce the GW+Bethe-Salpeter method\, the standard for studying excitons in condensed matter with an atomistic description. \n\n\n\n\n\n\n\nJan Wilhelm
URL:https://grk2905.de/event/grk-colloquium-excitations-in-condensed-matterfrom-theory-to-real-materials-ii/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/webp:https://grk2905.de/wp-content/uploads/2024/01/JanWilhelm-e1718286072274.webp
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240621T141500
DTEND;TZID=Europe/Berlin:20240621T154500
DTSTAMP:20260413T065137
CREATED:20240613T131538Z
LAST-MODIFIED:20260326T163208Z
UID:1261-1718979300-1718984700@grk2905.de
SUMMARY:RTG Colloquium:Excitations in condensed matter: from theory to real materials I
DESCRIPTION:This lecture series on excitations in condensed matter will explore electronic excitations\, linking theoretical concepts and experimental observations. The first lecture will cover ground-state and excited-state solutions of the many-body Schrödinger equation for electrons and nuclei. We will illustrate how these solutions are linked to motion on the nanoscale with examples from ultrafast nanoscience and biochemistry. We will also discuss time-dependent density functional theory\, highlighting its success in studying plasmons\, the electronic excitations in metals. \n\n\n\n\n\n\n\nJan Wilhelm
URL:https://grk2905.de/event/grk-colloquiumexcitations-in-condensed-matter-from-theory-to-real-materials-i/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/webp:https://grk2905.de/wp-content/uploads/2024/01/JanWilhelm-e1718286072274.webp
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240614T141500
DTEND;TZID=Europe/Berlin:20240614T154500
DTSTAMP:20260413T065137
CREATED:20240613T131317Z
LAST-MODIFIED:20260326T163228Z
UID:1259-1718374500-1718379900@grk2905.de
SUMMARY:RTG Colloquium:Ultrafast nanoscopy experiments
DESCRIPTION:Markus Huber
URL:https://grk2905.de/event/grk-colloquiumultrafast-nanoscopy-experiments/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2024/06/be7e3d225759-original_FF9ACBB70DFE4DDD5D9403CE5C92A336-e1718286108349.jpg
END:VEVENT
END:VCALENDAR