Numerical simulations of two-dimensional beam propagation in polydiacetylene para-toluene sulfonate measured values for n2 >0 and n3 < 0, where Δn - n2I + n3I2, predict stable self-trapping and a new phenomenon in which a spatial ring evolves from a Gaussian input beam. We interpret the numerical results theoretically, using the variational model of nonlinear Gaussian beam propagation.
© 1995 Optical Society of America
Ewan M. Wright, Brian L. Lawrence, William Torruellas, and George Stegeman, "Stable self-trapping and ring formation in polydiacetylene para-toluene sulfonate," Opt. Lett. 20, 2481-2483 (1995)