Photo-induced optical rotation by excitation of higher modes in AgCl-Ag nano-layers under elliptically polarized light irradiation

In the present work, formation of self-organized periodic nanostructures (SPN) in photosensitive thick (h ~ 270 nm) slab waveguide AgCl films doped by silver nanoparticles is studied. The SPN is formed as a result of interaction of a elliptically polarized light, incident light, with the AgCl-Ag layer. Formation of such nanostructure induces in the film an optical activity, which is due to the induced anisotropy and the chirality of the formed structure. The greater thickness of the layer results in excitation of higher mode TE1 of the slab waveguide which leads to simultaneous formation of two SPN associated with TE0 and TE1 modes, accordingly. It is shown that, irradiation by elliptically polarized light results in more complicated SPN with enhanced chirality, which creates stronger induced optical activity of the samples.