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X-WR-CALDESC:Events for GRK 2905 - Ultrafast Nanoscopy
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DTSTART;TZID=Europe/Berlin:20250704T140000
DTEND;TZID=Europe/Berlin:20250704T160000
DTSTAMP:20260531T102855
CREATED:20250526T081344Z
LAST-MODIFIED:20260326T162518Z
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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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250711T140000
DTEND;TZID=Europe/Berlin:20250711T160000
DTSTAMP:20260531T102855
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250718T100000
DTEND;TZID=Europe/Berlin:20250718T120000
DTSTAMP:20260531T102855
CREATED:20250630T100507Z
LAST-MODIFIED:20260326T162339Z
UID:1720-1752832800-1752840000@grk2905.de
SUMMARY:RTG Seminar: Ryo Shimano
DESCRIPTION:Higgs mode in superconductors studied by nonlinear terahertz spectroscopy Cryogenic Research Center & Department of Physics \n\n\n\nThe University of Tokio \n\n\n\ng \n\n\n\nRecent developments of experimental techniques based on ultrafast spectroscopy have enabled the access to low energy collective modes in quantum materials in a time-resolved manner. In particular\, the amplitude mode of the order parameter in superconductors\, called the Higgs amplitude mode\, has attracted a growing interest from the viewpoint of non-equilibrium dynamics in symmetry-broken ordered phases. In this presentation\, I will introduce the study of the Higgs mode and other collective modes in conventional and unconventional superconductors using various nonlinear terahertz spectroscopic schemes. \n\n\n\n \n\n\n\nVenue: RUN Auditorium
URL:https://grk2905.de/event/grk-seminar-ryo-shimano/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/06/Shimano-Ryo.jpg
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250723T140000
DTEND;TZID=Europe/Berlin:20250723T160000
DTSTAMP:20260531T102855
CREATED:20250630T091602Z
LAST-MODIFIED:20260326T162327Z
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SUMMARY:RTG seminar: Patrick Rupprecht
DESCRIPTION:Shedding light on ultrafast quantum dynamics with attosecond spectroscopyFeodor Lynen Postdoctoral FellowLeone & Neumark GroupsLawrence Berkeley National LaboratoryUSA \n\n\n\n \n\n\n\nThe physics and chemistry of matter is determined by the interaction of electrons and nuclei on ultrafast timescales down to the attosecond (10-18 s) regime. In this seminar\, I will highlight how attosecond photon spectroscopy grants us a detailed look into the intricate quantum dynamics within atoms and molecules. Beyond precision metrology\, shortest laser pulses allow us to precisely manipulate the quantum interactions of electrons and nuclei. \n\n\n\nVenue: RUN auditorium
URL:https://grk2905.de/event/grk-seminar-patrick-rupprecht/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2025/06/Screenshot-2025-06-30-111427-e1751274990233.png
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DTSTART;TZID=Europe/Berlin:20250725T080000
DTEND;TZID=Europe/Berlin:20250725T170000
DTSTAMP:20260531T102855
CREATED:20250526T081913Z
LAST-MODIFIED:20250526T081913Z
UID:1677-1753430400-1753462800@grk2905.de
SUMMARY:Tag der Naturwissenschaften
DESCRIPTION:
URL:https://grk2905.de/event/tag-der-naturwissenschaften/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250729T140000
DTEND;TZID=Europe/Berlin:20250729T170000
DTSTAMP:20260531T102855
CREATED:20250630T092030Z
LAST-MODIFIED:20260326T162357Z
UID:1712-1753797600-1753808400@grk2905.de
SUMMARY:RTG seminar:Martin Švec
DESCRIPTION:Photon-induced processes at single molecules in SPM nanocavitiesInstitute of PhysicsCzech Academy of SciencesPraha 6\,Czech Republic \n\n\n\n \n\n\n\n \n\n\n\nExploration of isolated chromophores – optically active molecules – often reveals stunningly complex internal dynamics of excitations and transitions between electronic configurations\, influenced by coupling to vibrational levels and reorganization of local environments. One of the promising tools for studying the photophysics of individual molecules with nanometer resolution is optical spectroscopy that employs plasmonic\, atomically sharp tips in Scanning Probe Microscopy (SPM)\, which overcomes the fundamental spatial resolution limits of visible and infrared light. This methodology enables measurements that correlate electronic structure and atomic arrangement with various photon spectroscopies – e.g.\, fluorescence\, absorption\, and Raman scattering – as a function of applied electric field and measurement geometry. In this lecture\, I will present our experiments with photon spectroscopies using SPM\, focusing in particular on photon absorption-induced phenomena such as photoluminescence\, and photon-induced current generation\, through which we achieved a direct visual discrimination among the components of a multiconfigurational state of an open-shell chromophore. \n\n\n\nVenue: RUN 0\,35
URL:https://grk2905.de/event/grk-seminarmartin-svec/
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2025/06/Screenshot-2025-06-30-111801.png
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