22 May 2013 Liquid-crystal tunable plasmonic stripe directional coupler switches
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In this work we design and theoretically investigate optical switches based on long-range plasmonic directional couplers, which are controlled via the electro-optic effect of nematic liquid crystal layers. Employed numerical tools include a fully-anisotropic finite-element-method, the eigenmode-expansion method, and a rigorous finite-element based calculation of the liquid-crystal molecular reorientation. Both horizontal and vertical configurations are assessed, providing a comparison in terms of key-performance characteristics, such as coupling length, switching voltage, insertion losses, and crosstalk. These tunable plasmonic devices are envisaged as ultra-low power consumption switching elements in integrated platforms for optical inter-chip interconnects.
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D. C. Zografopoulos, D. C. Zografopoulos, R. Beccherelli, R. Beccherelli, "Liquid-crystal tunable plasmonic stripe directional coupler switches", Proc. SPIE 8767, Integrated Photonics: Materials, Devices, and Applications II, 876712 (22 May 2013); doi: 10.1117/12.2016954; https://doi.org/10.1117/12.2016954

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