Abstract

Metasurfaces can control the propagation of free space and guided modes by imparting a phase gradient and modifying the mode propagation properties. Here we propose a design to control optical signals in a dielectric-loaded waveguide using quasi-rhombus gradient plasmonic metasurface structure. The metasurface acts as a multimode interference coupler that can focus, route, and split the propagating field in UV-visible spectral range. The ability to gain full control on waveguided mode with minimal footprint can significantly impact miniaturization of optical devices and photonic integrated circuits.

© 2019 Optical Society of America

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