Abstract
The communication presents a study concerning the azo-polymer response to the pulse laser irradiation, in the context of the surface relief gratings (SRGs) inscription. We used the different energy density of the laser beam (10 and 45 mJ/cm2) and their number of pulses (10 and 100) to observe the influence of the irradiation conditions on the amplitude of SRGs. The modulation of the polymer surface up to 440 nm was obtained. It was showed that key factors decided about polymer surface modulation depth, except irradiation conditions, are the azodye content in the polymer repeating units and flexibility of the polymer backbone. Moreover, unexpected effect of polymer molar masses on the SRG amplitudes was observed. The beneficial effect of higher polymer molar masses on SRGs formed using the stronger power of irradiation beam was found.
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