Light-Alignment Controllable Beam Splitter and Vectorial Displacement Sensor in the Stopped-Light Regime of Plasmonic Metasurfaces

• DOI: 10.1021/acsphotonics.0c01530
• Publication Date: 2020-12-29T09:54:41Z
• Authors: Maria I. Benetou; Kosmas L. Tsakmak...
• Keywords: Beam splitter; Light beam

We report the experimental realization of periodically perforated plasmonic metasurfaces capable integrating several key functionalities, such as light-to-surface plasmon coupling, controllable beam-splitting, wavelength filtering and routing, high resolution differential measurement, vectorial displacement sensing. The operate at telecom wavelengths, vicinity eigenmode crossing points where zero group velocity is experienced, their functionality parameters, sensitivity to misalignment, prong angular separation, power ratio, polarization, bandwidth, can be adjusted by designing boundary shape conveniently manipulating alignment with illuminating light beam. In same context, a circular metasurface could also serve sensor monitoring simultaneously magnitude direction between its center that compact, easily controllable, all-in-one nature our devices enable on-chip integrated circuits adaptable for applications in sensing optical signal processing.