Methods and applications of on-chip beam splitting: A review

The construction of large-scale integrated photonic circuit cannot be separated from the important role played by silicon-based optoelectronic devices. As a basic and link in on-chip photon propagation, beam splitting is great significance for efficient utilization sources compact integration It widely used power splitting, polarization separation, wavelength division multiplexing other scenarios. This paper reviews methods recent years, which are mainly divided into following categories: y-branch, multimode interference coupling, directional inverse design. introduces their research status, including optimization design methods, functions applications quantum chips hybrid integration, looking forward to providing reference further wide application splitters frontier field future.