Photonic waveguide (IMAGE)

Technical University of Denmark

Photonic waveguide

Caption

The figure shows a scanning electron microscope image of one of the photonic waveguides studied by the DTU researchers. The waveguide is formed at the edge between two photonic topological insulators (blue and red) which are realized in nanoscale silicon membranes. It has been predicted that light propagating in such topological waveguides is immune to backscattering on structural defects, but this was never investigated experimentally. For the first time, the DTU team checked this in an experiment and found the opposite: strong backscattering. Credit: C. A. Rosiek.

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Credit: C. A. Rosiek.

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Please credit C.A. Rosiek.

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