Complex Dynamics in Quantum Dot Light Emitting Diodes
We report both experimentally and theoretically the appearance of Mixed Mode Oscillations (MMOs) and chaotic spiking in a Quantum Dot Light Emitting Diode (QDLED). The proposed model reproduces the appearence of homoclinic chaos and MMOs. The dynamics is completely determined by the variation of the injecting bias current in the wetting layer. The influence of the injecting current on the transition between MMOs and chaos has been also investigated by means of a suitable modulation on it.