In quantum optics, orbital angular momentum (OAM) is very promising to achieve high-dimensional quantum states due to the nature of infinite and discrete eigenvalue, which is quantized by the topological charge of l. Here, a heralded single-photon source with switchable OAM modes is proposed and demonstrated on silicon chip. At room-temperature, the heralded single photons with 11 OAM modes (l=2~6, -6~-1) have been successfully generated and switched through thermo-optical effect. We believe that such an integrated quantum source with multiple OAM modes and operating at room-temperature would provide a practical platform for high-dimensional quantum information processing. Moreover, our proposed architecture can also be extended to other material systems to further improve the performance of OAM quantum source.
@article{arxiv.2111.05594,
title = {Room-temperature on-chip generation of heralded single photons with switchable orbital angular momentum},
author = {Shan Zhang and Xue Feng and Wei Zhang and Kaiyu Cui and Fang Liu and Yidong Huang},
journal= {arXiv preprint arXiv:2111.05594},
year = {2022}
}