Light propagation in double-periodic nonlinear photonic lattices in lithium niobate |
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| Authors: | E Smirnov CE Rüter D Kip K Shandarova V Shandarov |
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| Institution: | (1) Institute of Physics and Physical Technology, Clausthal University of Technology, Leibnizstr. 4, 38678 Clausthal-Zellerfeld, Germany;(2) State University of Control Systems and Radioelectronics, 40 Lenin Ave., 634050 Tomsk, Russia |
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| Abstract: | Single- and double-periodic one-dimensional photonic lattices are formed in lithium niobate using both titanium in-diffusion
and holographic grating recording. We investigate linear band structures and diffraction properties of such superlattices
and observe a decrease of discrete diffraction with increasing modulation depth of the second superimposed lattice. In weakly
modulated superlattices with tailored diffraction properties, our results demonstrate the formation of discrete solitons having
a propagation constant inside the extra mini-gap formed inside the Brillouin zone.
PACS 42.65.Tg; 42.70.Qs; 42.82.Et |
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