Silicon-based integrated four-way spatially multiplexed multi-port single-photon source. - Baojie Hou; Qishen Liang; Haoran Ma; Zichao Zhao; Fanjie Ruan; Bin Zhang; Donghui Chen; Yawen Tu; Yuehai Wang; Huihui Zhu; Jianyi Yang (OFC, 2026)