Formation of self-trapping waveguides in bulk PMMA media doped with Phenanthrenequinone

摘要

Experimental and theoretical investigations of light self-trappingwaveguides in a bulk polymeric medium based on polymethylmethacrylate(PMMA) with photosensitive phenanthrenequinone (PQ)-molecules areexamined. Self-channeling was generated for the first time in this nonlinearbulk PQ-PMMA media with a thickness up to several millimeters and0.1 mol. % PQ-concentration. The experimental formation of volumewaveguide structures with a length of 2 - 3 cm at different laserwavelengths (405 nm, 488 nm, and 514.5 nm) was demonstrated. Thecalculations based on a model for the laser beam propagation in the bulkPQ-PMMA medium with competitive nonlinearities are in a goodagreement with the experiments.