Room-temperature single-photon emission from III-nitride nanowire quantum dots: towards realization of the photonic qubit-based quantum computer

Abstract

III-nitride nanowire quantum dots (NWQDs) are in high-demand due to their ability to emit single photons at room temperature across the entire UV to visible wavelength range. Although tremendous progress has been made over the past decade, the efficiency of these QDs has not improved significantly. This limitation arises because true lateral confinement was difficult to achieve owing to challenges in reducing the QD diameter to the radial confinement limit. Furthermore, the presence of a giant built-in potential in NWQDs has restricted their fast operation. In this review article, we present the evolution of the III-nitride NWQD field and discuss how these challenges have been addressed to realize high-efficiency single-photon sources. Towards the end of the article, we demonstrate how these NWQDs can be leveraged to build up a photonic qubit-based quantum computer, which will be capable of operating at room temperature.