The efficiency of quantum dash single-photon emitters can be increased if the quantum dashes are embedded in cylindrical mesas. This is demonstrated by photoluminescence spectra and numerical simulations using JCMsuite.
P. Wyborski, et al. InP-Substrate-Based Quantum Dashes on a DBR as Single-Photon Emitters at the Third Telecommunication Window. Materials, 14, 4 (2021).
DOI: 10.3390/ma14040759