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A novel Silicon-on-insulator (SOI) integrated optic waveguide configuration is investigated as a platform for sensing. Our thin-ridge SOI waveguide structures exhibit lateral leakage and utilise strong evanescence to sense the presence of a biofilm.
Domain engineering 128° YX-cut lithium niobate crystals by ultraviolet direct-domain writing is reported. The evidence of the inverted domains were shown from both piezoresponse force microscopy and hydrofluoric acid etching.
Roughness induced scattering in thin, shallow-ridge silicon on insulator waveguides is analyzed by coupled mode theory and verified experimentally. Roughness in different waveguide regions causes different scattering natures of TM and TE modes.
We study both theoretically and experimentally the nonlinear surface waves at the edge of curved waveguide arrays with a surface defect. We show that the nonlinear coupling between different linear modes supported by the array can lead to beam switching to different output waveguides with increasing of the nonlinearity strength. Our experimental observations are in good agreement with the numerical...
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