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A tunable waveguide array in NLCs: (a) front view; (b) side view. The top-electrode is arranged in a periodic pattern of period . The cell thickness is and the liquid crystals is 5CB, with , and at 1.064 μm.
Linear analysis of the voltage-controlled NLC array: coupling distance vs (a) period and (b) bias .
BPM simulation of nonlinear beam steering: (a) linear diffraction of a Gaussian beam launched with a tilt of 1.90° in the plane; (b) map of transverse intensity distribution (scaled to the peak value) in the output segment vs for various input powers (vertical axis); (c) discrete soliton for ; (d) transverse intensity profiles in for and , respectively.
Experimental results: (a) set of four joint photographs showing the discrete propagation of a tilted (1.90°) Gaussian beam launched with ; (b) photo-collage of light distribution in vs for various input powers (vertical axis); (c) set of four joint photographs showing nonlinear propagation for an excitation ; (d) transverse intensity profiles in for and , respectively.
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