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Scanning electron microscope image of the lithium niobate photonic crystal superprism. It was fabricated by FIB milling on an X-cut Y-propagating annealed proton exchange waveguide. The internal generated field thanks to the pyrolectric field is parallel to the Z-axis.
Experimental setup for the measurement of the pyroelectric beam steering tunability of a lithium niobate photonic crystal superprism.
Experimental beam position as a function of substrate temperature (circles) and the linear fit (solid line).
Optical mode Z cross-sections obtained at the exit of the APE waveguide for temperatures , 20, and , respectively. We can easily appreciate the beam displacement due to the temperature variations.
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