Optical stopping effect on As20S80 system film waveguide

Compared with As₂₀S₈₀, P₂As₂₀S₇₈ film waveguide deteriorates the response behavior of recovery propagation and mainly performs the slow later stage in recovery propagation process. However, for Sn₁As₂₀S₇₉, it can improve evidently the fast earlier stage in the recovery propagation process to shorten response time to the milliseconds level, and also reduce the optical propagation loss. Experiments also show that the optical stopping effect can reach a saturated degree under He-Cd laser illumination for no less than 800ms.