All-dielectric metasurface-based roll-angle sensor

We propose and demonstrate an all-dielectric metasurface-based roll-angle sensor, in which the roll angle is translated into the change of polarization state of the probe light. A circular polarization beam splitter is designed and fabricated to split the probe light into right-circularly polarized and left-circularly polarized light beams, whose intensities are then collected to estimate the roll angle. The experimental results show that the developed roll-angle sensor has a measurement resolution of 0.1° and a measurement range of 30°. The all-dielectric metasurface-based design promises to substantially reduce the size of the roll-angle sensor and is expected to gain wide applications especially on space-limited occasions.