Transition from Dirac points to exceptional points in anisotropic waveguides
Transition from Dirac points to exceptional points in anisotropic waveguides
We uncover the existence of Dirac and exceptional points in waveguides made of anisotropic materials, and study the transition between them. Dirac points in the dispersion diagram appear at propagation directions where the matrix describing the eigenvalue problem for bound states splits into two blocks, sorting the eigenmodes either by …