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MO: Fachverband Molekülphysik
MO 23: Cluster and Nanoparticles I (joint session MO/A)
MO 23.7: Vortrag
Donnerstag, 13. März 2025, 12:45–13:00, HS XV
Laser-induced alignment of macromolecules and nanoparticles — •Lukas Vincent Haas1,2,3, Xuemei Cheng1, Muhamed Amin1, Stefanie Lenzen1,3, Amit Kumar Samanta1,2,3, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Department of Physics, Universität Hamburg, Germany — 3Center for Ultrafast Imaging (CUI), Universität Hamburg, Germany
X-ray free-electron lasers (XFELs) promise to enable the diffractive imaging of single molecules and nanoparticles, but image reconstruction remains a major bottleneck in achieving atomic spatial resolution[1]. Laser-induced alignment of nanoparticles and macromolecules during the diffractive imaging process has the potential to push resolution toward the atomic scale [2]. We present the quantitative computational modeling of nanoparticle alignment using classical mechanics and electrodynamics [3] along with the first experimental evidence of laser-induced alignment of tobacco mosaic virus (TMV) in an XFEL-compatible setup. The alignment was probed through optical scattering. A recently conducted XFEL experiment provides initial results on diffractive imaging of laser-aligned TMV. Comparing computational and experimental results, we conclude that a high degree of alignment is achieved for TMV in our experiments.
[1] K. Ayyer, et al., Optica 8(1) (2021)
[2] J. C. H. Spence, et al., Phys. Rev. lett. 92, 198102 (2004)
[3] M. Amin, et al., arXiv:2306.05870 [physics], (2023)
Keywords: Laser-induced alignment; Single Particle Imaging; Aerodynamic Lens Stack; Optical scattering microscopy; Fluorescence