3 April 2003 Investigation on poling of lithium niobate patterned by interference lithography
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We realized one and two dimensional periodic ferroelectric domain structures obtained by an electric-field poling process applied to 500μm thick Lithium Niobate crystal samples patterned by means of interference lithography. The fringe pattern is realized using a Michelson interferometric set-up and a He-Cd laser. We report on the appearance of high density and micrometer-sized single dot domains aligned along the direction of the interference fringes, as consequence of overpoling procedures. These structures are similar to those induced by back-switching. The effect seems to be originating by inverted domains’ merging under the photoresist fringe pattern after spreading. We investigate the possibility to obtain a highly regular and homogeneous dot-structure which can find application for photonic crystals technology and nonlinear optics.
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Simonetta Grilli, Simonetta Grilli, Sergio De Nicola, Sergio De Nicola, Pietro Ferraro, Pietro Ferraro, Andrea Finizio, Andrea Finizio, Paolo De Natale, Paolo De Natale, Giovanni Pierattini, Giovanni Pierattini, M. Chiarini, M. Chiarini, } "Investigation on poling of lithium niobate patterned by interference lithography", Proc. SPIE 4944, Integrated Optical Devices: Fabrication and Testing, (3 April 2003); doi: 10.1117/12.472011; https://doi.org/10.1117/12.472011

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