Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 25: Novel Experimental Approaches
MO 25.3: Vortrag
Freitag, 15. März 2024, 11:30–11:45, HS 3044
Laser-induced alignment of macromolecules and nanoparticles — •Lukas Vincent Haas1,2,3, Xuemei Cheng1, Muhamed Amin1, 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, while image reconstruction remains a major bottleneck in achieving atomic spatial resolution [1]. Laser-induced alignment of nanoparticles and macromolecules has the potential to improve the achievable resolution by reducing the complexity of the diffraction volume search space and push it toward the atomic scale [2]. Here, we will present quantitative computational modeling of nanoparticle alignment using classical mechanics and electrodynamics [3] and first experimental evidence of laser-induced alignment of tobacco mosaic virus (TMV) in a setup that is applicable to XFEL experiments [4]. Furthermore, a recently conducted XFEL experiment provides first results on diffractive imaging of laser-aligned TMV. Comparing computational and experimental results, we can 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: Single particle imaging; Aerodynamic lens; Laser-induced alignment; Laser control