Fig. 1: The theoretical scheme of the QD-in-topological cavity structure.
From: Single photon emitter deterministically coupled to a topological corner state
(a) A schematic of the topological photonic crystal cavity with a quantum dot (QD), where a topologically nontrivial (red) PhC is surrounded by a trivial (blue) PhC. The black arrow represents a diagonally-polarized electric dipole source, representing a single QD; (b) The electric mode profile of the corner state at 889.368 nm, showcasing a Q factor of 4837, a mode volume of 0\(.266{(\lambda /{n}_{{\rm{G}}{\rm{a}}{\rm{As}}})}^{3}\), and a Purcell factor of 845; (c) A schematic of the QD-topological photonic crystal cavity system without the center hole; (d) The electric mode profile of corner state without the center hole at 901.428 nm, showing a Q factor of 13192, a mode volume of 0\(.309{(\lambda /{n}_{{\rm{G}}{\rm{a}}{\rm{As}}})}^{3}\), and a Purcell factor of 434
