Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 63: Matter Wave Optics
Q 63.1: Talk
Friday, March 18, 2022, 10:30–10:45, Q-H10
Bragg diffraction of large organic molecules — Christian Brand1,2, Filip Kiałka1,3, Stephan Troyer1, Christian Knobloch1, •Ksenija Simonović1, Benjamin A. Stickler3,4, Klaus Hornberger3, and Markus Arndt1 — 1University of Vienna, Faculty of Physics — 2German Aerospace Center (DLR), Institute of Quantum Technologies — 3Faculty of Physics, University of Duisburg-Essen — 4QOLS, Blackett Laboratory, Imperial College London
We present the first experimental realization of Bragg diffraction for polar and non-polar molecules [1]. Using a thick laser grating at 532 nm, we diffract a molecular beam and observe Bragg diffraction in the far-field. We study this effect for the dye molecule phthalocyanine and the antibiotic ciprofloxacin and observe a pronounced angular dependence and asymmetry in the pattern, characteristic for Bragg diffraction. We can thus realize an effective mirror and a large-momentum molecular beamsplitter with a momentum transfer of up to 18 grating photon momenta ℏ k. This is an important step towards gaining control over the manipulation of functional, complex molecules.
[1] Brand et al. Phys. Rev. Lett. 125, 033604