Beam splitters facilitate quantum information processing and secure communication protocols, playing an important role in implementing linear optical quantum gates, performing Bell state measurements, and enabling quantum key distribution (QKD). As a basic and important link in on-chip photon propagation, beam splitting is of great significance for the efficient utilization of sources and. The beam splitter consists of two nanobeam waveguides, which form a directional coupler. The splitting ratio of the directional coupler is controlled by varying the out-of-plane separation of the two waveguides using electromechanical actuation. We reversibly tune the beam splitter between an. A beam splitter or beamsplitter is an optical device that splits a beam of light into a transmitted and a reflected beam. It is a crucial part of many optical experimental and measurement systems, such as interferometers, also finding widespread application in fibre optic telecommunications. In its. In this paper, we propose a compact structure consisting of silicon nanoantennas and waveguides for controlling the conversion of linearly polarized light in free space into guided waves and propagating along the waveguide. Quantum information related theories.
