We demonstrate theoretically and experimentally that optical beams are self-focused and self-trapped upon initiating photopolymerization. This unique nonlinear optical phenomenon is dependent on the optical exposure and produces permanent index-of-refraction changes larger than 0.04. The resulting nonlinear wave equation is shown to be nonlocal in time and displays self-trapped solutions only for sufficiently low average optical intensities.
© 1996 Optical Society of America
Anthony S. Kewitsch and Amnon Yariv, "Self-focusing and self-trapping of optical beams upon photopolymerization," Opt. Lett. 21, 24-26 (1996)