Fig. 5: Temperature dependent laser performance.

a Temperature dependence of the lasing threshold, and the blue line represents the exponential fit to the experimental data (black dots), revealing the characteristic temperature T₀ of 93.9 K. The inset shows the measured L–L curve of the laser at 303 K, indicating a threshold at 18 μW. b Normalized lasing spectra at the pumping power 200 μW (above threshold) from 273 to 343 K. c Temperature dependence of lasing wavelength at the pumping power 200 μW. The dashed line is the linear fit to the experimental data (brown circles), showing a linear wavelength-temperature tuning rate of 0.055 nm K⁻¹