Key points are not available for this paper at this time.
Optically pumped laser action at a wavelength of 0.63 μm has been achieved at 77 K in InGaP/InGaAlP double heterostructures grown on (100) GaAs substrates by molecular beam epitaxy. The threshold pump power density was about 2.5 × 103 W/cm2
Asahi et al. (Thu,) studied this question.