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X-WR-CALNAME:GRK 2905 - Ultrafast Nanoscopy
X-ORIGINAL-URL:https://grk2905.de
X-WR-CALDESC:Events for GRK 2905 - Ultrafast Nanoscopy
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DTSTART;TZID=Europe/Berlin:20250704T140000
DTEND;TZID=Europe/Berlin:20250704T160000
DTSTAMP:20260428T235140
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250711T140000
DTEND;TZID=Europe/Berlin:20250711T160000
DTSTAMP:20260428T235140
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:20251121T140000
DTEND;TZID=Europe/Berlin:20251121T150000
DTSTAMP:20260428T235140
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20251202T141500
DTEND;TZID=Europe/Berlin:20251202T151500
DTSTAMP:20260428T235140
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260116T140000
DTEND;TZID=Europe/Berlin:20260116T150000
DTSTAMP:20260428T235140
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20260123T140000
DTEND;TZID=Europe/Berlin:20260123T150000
DTSTAMP:20260428T235140
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:20260130T140000
DTEND;TZID=Europe/Berlin:20260130T150000
DTSTAMP:20260428T235140
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
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