We evaluated the temperature dependence of the internal quantum efficiency of 1.5-µm-wavelength GaInAsP/InP compressively-strained 20-nm-wide quantum-wire lasers from the cavity length dependence of the differential quantum efficiency. As a result, high internal quantum efficiency η i ∼1.0 was obtained at T <200 K, which decreased with an increase in temperature.
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T. Arai (1999) studied this question.
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