Non-polar nitride single-photon sources

Non-polar nitride single-photon sources are developed in order to minimise the undesired side effects caused by the internal fields of polar nitrides, while retaining the benefits of high-temperature single-photon generation from a semiconductor quantum dot platform. As a relatively newer single-photon source, several reports have already been made highlighting their interesting optical and photophysical properties. These include an average ultrafast radiative exciton recombination lifetime of <200 ps, an average slow-timescale spectral diffusion of <40 μ eV, polarisation-controlled single-photon generation up to 220 K, and temperature-dependent fine-structure splitting. In this review, the photophysics, improvement of optical properties, and future of non-polar nitride single-photon sources will be closely examined based on current reports in the literature.