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Effects of e-Beam Parameters on Sub-micron Ferroelectric Domain Engineering in Liquid Phase Epitaxy LiNbO3 by Direct - Write e – Beam

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Abstract

By using the direct-write e-beam technique with liquid phase epitaxy LiNbO3 thin films, we have successfully produced sub-micron domain structures for achieving dynamically switchable filters in a periodically poled lithium niobate (PPLN) waveguide. The effects of direct-write e - beam parameters are investigated to achieve sub-micron periodic domain structures in homoepitaxial liquid phase epitaxy (LPE) LiNbO3 thin films. More regular structures appear at acceleration voltages higher than 20 kV and areal dose range 350 μC / cm2 ~ 450 μC / cm2 with lower scanning speeds. Under these optimal conditions, an approximately 500 μm-long grating of a 1.1 μm period, consisting ~ 180 nm domains is achieved.

© 2005 Optical Society of America

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