title: On the inscription of period and half-period surface relief gratings in azobenzene-functionalized polymers.
abstract: Laser-light-induced surface relief grating inscription was carried out in the newly synthesized azobenzene-functionalized poly(amide-imide)s having the same main- and side-chain structures but different substituents in the azobenzene groups. The gratings were inscribed employing the two-wave mixing technique with linearly polarized laser beams. Three different polarization configurations were used: s-s, p-p, and s-p. The relatively deep surface relief gratings of period Lambda were formed for the case of s-s and p-p polarizations, whereas the s-p inscription resulted in the half-period grating (Lambda/2) with the weak surface modulation. The origin of the formation of Lambda/2 structure for s-p configuration results from the interference between zeroth- and first-order beams scattered on the polarization refractive index grating and having the same polarization. On the basis of this idea, we presented the simple kinetic model predicting and modeling the half-period grating formation with its temporal evolution. The proposed model is consistent with the experimental findings.
authors: Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
authors: Anna
authors: A
authors: Sobolewska
authors: Andrzej
authors: A
authors: Miniewicz
mesh_terms: D000577:Amides / Q000737:chemistry* / Q000528:radiation effects; D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D007094:Imides / Q000737:chemistry* / Q000528:radiation effects; D007834:Lasers; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D013997:Time Factors
chemical_list: D000577:Amides; D001391:Azo Compounds; D007094:Imides; D011108:Polymers; C009850:azobenzene