The authors demonstrate a novel electro-optically addressable switch that uses electric-field controllable total internal reflection at an interface between two anti-parallel domains fabricated in single crystal LiNbO3. With an applied field, the induced index change at the interface is sufficient to switch the beam from transmission to reflection with a contrast ratio exceeding 20 dB in current samples.
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Boyland et al. (2001) studied this question.
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