We propose a versatile guided-wave geometry encompassing electro-optic control for signal routing. A zero-gap directional coupler in liquid crystal can switch between two output states in the guide plane, permitting signal rerouting with modulation voltages as small as 70 mV. In the absence of an applied bias, no guiding-hence no modal output-is provided by the structure. (c) 2005 Optical Society of America.
Asquini R, Fratalocchi A, d'Alessandro A, & Assanto G (2005). Electro-optic routing in a nematic liquid-crystal waveguide RID G-8796-2011 RID B-4223-2010. APPLIED OPTICS, 44(19), 4136-4143 [10.1364/AO.44.004136].