Figure 2: Finite element simulations of our optimized TO multimode multimode bend.
From: On-chip transformation optics for multimode waveguide bends
The figure shows the magnetic field magnitude squared (|H|2) for the cases when the bend is excited with the first three modes of the input multimode waveguide (a–c, respectively). The input modes (blue cross-sections, on the upper-right endpoints) are preserved throughout the bends, showing minimal inter-mode coupling at the outputs (red, on the lower left endpoints). The waveguides are 4 μm wide and the bends have 78.8 μm radius.
