NONLINEAR OPTICAL INVESTIGATIONS OF THE POLYMER SURFACES MODIFIED BY THE UV-LASER ILLUMINATION

摘要

An essential influence of the nitrogen laser (λ=337 nm) photon fluxes, UV-light time exposure and temperature on he behaviour of corresponding nonlinear optical susceptibilities obtained from surfaces for different types of polymers was observed. Temperature dependencies show an existence of a least two components of second harmonic generation (SHG) intensity. For all the specimens the increase of photoinduced SHG signal with decreasing temperature was revealed, which indicates on the possible low-temperature ordering of the samples under investigations.