RESONANT-TUNNELING INJECTION QUANTUM-WELL LASERS

We report, for the first time, the observation of resonant tunneling i nduced negative differential characteristics in the light-current (L-I ) and light-voltage (L-V) curves of a single-quantum-well semiconducto r laser. Broad-stripe lasers have exhibited CW threshold current densi ty of 50 A/cm(2) at 77 K, with a sharp decrease in output light power at 68 A/cm(2), which corresponds to a resonant point in the current-vo ltage (I-V) characteristics of the device. Peak to valley ratios of mo re than 1.5:1 were observed in the L-I and L-V curves.