Schematic maps of a straight waveguide (a) and a waveguide bend (b). The bottom panels show the scattering model that is employed in understanding the wave transport through the waveguide bend.
Typical measured and fitted decay curves of a straight waveguide and waveguide bend.
Schematic geometry of nine types of waveguide bend structures. It should be noticed that none of these nine waveguide bends are equivalent to each other.
Measured transmission spectra of nine types of waveguide bend structures in comparison with that of the straight waveguide.
Tips positions (in units of ) corresponding to the nine types of bend structures.
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