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Okay, das hier ist dann die ultimative Möbius Loop-Nerdery: Ein einseitiges, zweidimensionales Möbiusband aus Licht, das sie über eine Verdrehung der Polarisation (die Richtung elektromagnetischer Schwingungen des Lichts) erreicht haben.
"Light can kind of turn one-sided and single-edged under certain conditions," says Peter Banzer of the Max Planck Institute for the Science of Light in Erlangen, Germany. […]
Banzer's team scattered two polarised green laser beams off a gold bead that was smaller than the wavelength of the light. The resulting inference introduced a polarisation pattern with either three or five twists, giving it a Möbius-like structure. "These results are the first (experimental) proof that polarisation Möbius strips really exist, which has been a decade-long question in the community," Banzer says. "These findings emphasise the richness of light and its properties."
New Scientist: Möbius strips of light made for the first time