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High-power picosecond optical pumping of a thin GaAs layer generates intense picosecond stimulated emission. The emission spectrum is a light continuum. Based on the results of previous experimental work, the following was done. Estimates were obtained: (a) the amplification lengths of the spectral components of the emission, i. e. differing distances over which different components of the emission are amplified in the active medium created by the pump; (b) the dependence of the characteristic relaxation time of the emission components on their gain lengths. It is shown that the spectrum of the product of the gain length and the gain coefficient linearly relates the spectra of spontaneous and stimulated emission of GaAs. This connection was established at gain saturation, which is evidenced by a dip in the gain spectrum, ” burned out“ by intense emission. Физика и техника полупроводников, 2021, том 55, вып. 2

fizika i tehnika poluprovodnikov

Длины усиления спектральных компонент собственного стимулированного пикосекундного излучения, зависимость от них характерного времени релаксации указанных компонент и связь спектров стимулированного и спонтанного излучений в GaAs