Extended Data Fig. 1: Ensemble PLE dependence on annealing.
From: Indistinguishable telecom band photons from a single Er ion in the solid state
Blue: the ensemble PLE intensity for a high density sample. Orange: the PLE intensity recorded for the same sample after annealing at a temperature of 300 °C for 1 hour, revealing a 5x increase in fluorescence intensity. This data was obtained using a sample cooled to 4K.
