Surface Relief Gratings (SRG) were demonstrated experimentally more than 20 years ago. Despite many years of research eﬀorts the underlying physical mechanisms remain unclear. In this paper we present a short overview of the main concepts related to SRG - photoﬂuidization and its counterpart, the orientational approach - based on a seminal paper by Saphiannikova et al. Next, we summarize the derivation of the cos2 θ potential, following the lines of recent paper of this group. Those results validate the generic Monte Carlo model for the photoinduced build-up of the density and SRG gratings in a model polymer matrix functionalized with azo-dyes, presented in another part of the paper. The characterization of the photoinduced motion of polymer chains, based on our recent paper, is brieﬂy discussed in the last part of the paper. This discussion oﬀers a sound insight into the mechanisms responsible for inscription of SRG as well as for single functionalized nanoparticle studies.
A. C. Mitus, W. Radosz, T. Wysoczanski, and G. Pawlik, "Surface relief gratings: experiments, physical scenarios, and photoinduced (anomalous) dynamics of functionalized polymer chains," Proc. SPIE 10440, Optical Materials and Biomaterials in Security and Defence Systems Technology XIV, 1044005 (Presented at SPIE Security + Defence: September 12, 2017; Published: 26 October 2017); https://doi.org/10.1117/12.2278712.
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