Fig. 3: Photostability and polarization of SPEs in homoepitaxial β-Ga2O3 films.
a Stability tests of the PL spectra of quantum emitters measured under an excitation power of 5 mW and an integration time of 1 s. b Time-dependent PL intensity of the emitter with a sampling time bin size of 200 ms, showing no obvious blinking or bleaching. c Normalized polarization-dependent contour map of PL spectra for the quantum emitter. d Polar coordinate plot of the PL intensity and the polarization angle θ. The data are fitted with a cos²(θ) form fit function, yielding the polarization visibility of 54%.
