C. Gomez-reino et al., Non-paraxial diffraction-free propagation of light in a graded-index planar waveguide with hyperbolic secant refractive index profile, JPN J A P 1, 39(3B), 2000, pp. 1463-1467
A study of non-paraxial diffraction-free propagation of light with transver
se amplitude in sech through a planar waveguide with hyperbolic secant refr
active profile is presented. Analytical solution by the stationary phase me
thod is obtained. A particular case is analysed.