Electro‐Optical Characterization of CdSe Quantum Dot Laser Diodes

We report the electroluminescence characteristics at room-temperature of CdSe quantum dot laser diodes. In comparison with quantum well laser diodes emitting in the same wavelength region a different dynamical behaviour under pulsed operation is found. Under short pulsed (0.1 μs) current injection a blue shift of the emission and an intensity increase are found with increasing driving current. Electrically pumped lasing is realized for 50 ns pulse width.