Investigation of the photoinduced surface relief modulation in acrylamide-based photopolymer
Document Type Conference Paper
I. Naydenova, E. Mihaylova, S. Martin, V. Toal, “Investigation of the photoinduced surface relief modulation in acrylamide-based photopolymer”, Proceedings of MATRIB’04, Vela Luka, Croatia, p. 36, 2004.
A surface relief diffraction grating is inscribed in acrylamide photopolymer by holographic recording with spatial frequency below 300 l/mm. The periodic surface modulation appears in addition to a volume phase holographic grating. Due to the nature of the presented photopolymerisable material the gratings are induced by light only and no post-processing is required. An investigation of the dependance of the amplitude of the photoinduced relief modulation on spatial frequency of recording and on sample thickness has been carried out utilising white light interferometry. A model of the mechanism of surface relief formation is proposed on the basis of the measured dependencies. The possibility for inscription of surface relief modulation implies different applications of the photopolymer: fabrication of diffractive optical elements, recording of computer generated holograms and biosensors.