Abstract
AbstractIn this experimental work, we present a simple method for fabrication of 2D chiral structure on the surface of an azo‐polymer film. It has been shown that illuminating of an azo‐polymer film with a single uniform laser beam can create the surface relief pattern on the surface of the film. For different state of polarization different structures are obtained. Under ∼33° incidence angle and for 45° polarization direction, the formed structure is asymmetric, and it does not have a symmetry axis in the 2D plane. The AFM images of these patterns are not superimposable with their mirror images if we rotate the images in their planes. On the other hand, the mirror images of Fourier Transform of AFM images also are not coinciding with Fourier Transform of AFM images. Consequently, this structure is a 2D chiral structure. These patterns are shown the capability to rotate the polarization state of diffracted light in the transmission regime. The changes in the polarization state of light associate with the chirality of sample. This is a one‐step very simple and reversible method to fabricate 2D chiral systems (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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