For the same sample, the full width at half maximum of the ground state emission peak is as narrow as 19 meV at low injection current, and less than 40 meV even at saturation condition.

• 相同的试片中，低电流时的基态发光半高宽仅 19 毫电子伏特，基态饱和时不超过 40 毫电子伏特。