Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Control (joint session MO/Q)
Q 62.4: Talk
Friday, March 13, 2020, 14:45–15:00, f102
Laser-induced alignment of nanoparticels — •Hakan Akarsu1, 2, Muhamed Amin1, Lena Worbs1,2, Jannik Lübke1,2,3, Armando Estillore1, Amit K. Samanta1, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, Deutsches Elektronen Synchrotron DESY, Hamburg — 2Fachbereich Physik, Universität Hamburg — 3Center for Ultrafast Imaging, Universität Hamburg
Single-particle imaging (SPI) experiments at free-electron lasers (FELs) promise high-resolution-imaging of the structure and dynamics of nanoparticles. By guiding sample molecules in the gas phase into the x-ray focus of an FEL, diffraction patterns of individual particles can be collected. Sufficient amounts of patterns of identical nanoparticles are needed to overcome the inherently small signal-to-noise ratio and reconstruct the underlying 3D structure [1]. Laser-induced alignment of nanoparticles has potential to improve the achievable resolution and to push it toward the atomic scale [2,3].
Here, we present simulation results on laser-induced alignment of gold nanorods by integrating the Euler equation of rotational motion. We have also tested different laser pulse profiles for improvement of the alignment. In addition, we will present first experimental investigations of the laser-induced alignment of gold nanorods.
[1] M. M. Seibert, et al., Nature 470, 78 (2011)
[2] J. C. H. Spence, et al., Phys. Rev. Lett. 92, 198102 (2004)
[3] J. Küpper, et al., Phys. Rev. Lett. 112, 083002 (2014)