Non-paraxial diffraction-free propagation of light in a graded-index planar waveguide with hyperbolic secant refractive index profile

1. Gomez-Reino, C.
2. Perez, M.V.
3. Bao, C.
4. Flores-Arias, M.T.
5. Vidal, S.
6. Fernandez De Avila, S.