Fig. 1: Structure with quantum dots (QDs) for imaging and optimized circular Bragg gratings (CBGs).
From: High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band
a The layer stack for efficient localization of single InAs/InP QDs emitting at C-band. b Calculated CBG Purcell factor (dark red line, right axis) and photon extraction efficiency (numerical aperture (NA) = 0.65, full squares, and NA = 0.4, empty circles, left axis). Inset: far-field emission pattern with rings marking NA = 0.4 and NA = 0.65. EF - normalized electric field amplitude. c Scanning electron microscope image of a CBG cavity etched in InP on top of SiO2.
