Tin-doped cadmium sulfide nanowires
reveal donor–acceptor
pair transitions at low-temperature photoluminescence and furthermore
exhibit ideal resonator morphology appropriate for lasing at continuous
wave pumping. The continuous wave lasing mode is proven by the evolution
of the emitted power and spectrum with increasing pump intensity.
The high temperature stability up to 120 K at given pumping power
is determined by the decreasing optical gain necessary for lasing
in an electron–hole plasma