Fig. 2: The fabricated sample and the performance of the topological cavity.
From: Single photon emitter deterministically coupled to a topological corner state
a The scanning electron microscopy (SEM) images of a topological device patterned on a GaAs wafer. The inset provides a magnified view of the red area, highlighting the cavity’s location hosting the corner state. b The photoluminescence image captured under high pump power at the corner region. The red area indicates the presence of the cavity mode associated with the corner state, while the blue area corresponds to the modes associated with the 1D edge states. c The photoluminescence image captured under high pump power at the edge region. The peak of corner state vanishes while the edge states remain present
