Mid-infrared active scanning imaging with PbSnTe wavelength-tunable laser diodes grown via liquid-phase epitaxy

Abstract

L interaction with materials is an ongoing and developing field of Photonics and applied physics. Polymeric materials have very important applications in biology and medical science. For this purpose, the surface of the material in contact with the blood and the biological cells have to be blood and bio compatible. The surface modification of the polymeric materials, then, is intersted for the biological applications. Among the various methods for the surface modification, laser interaction has very advantages respect to the others. With proper selection of the laser parameters, the optimum improvement is obtained. Here laser surface modification of polymeric material relying on polyethersulfone (PES) membrane and film is discussed. The effects of the most important laser parameters including the laser wavelength, the fluence, the number of pulses, the pulse repetition rate and the pulse duration is investigated and the optimized condition is found. Beside the surface modification for the biological applcations, the other results of the interaction like the effects of the presence of pedestal pulse in ultrashort pulses, the possibility for the investigation of the bulk of the membrane with laser treatment and the modification of the surface for the other applications are talked. (PES is the most important applied polymeric material for the hemodialysis filters.)