Our microscopic, spatially resolved model combines a density matrix description of the optoelectronic properties of quantum well gain media with the full-time-domain Maxwell equations for the electromagnetic (i.e. the coupled electric and magnetic) field dynamics.
A quantum efficiency gain of at least 18% can be inferred, from an artifactual test, between textured and flat n-well/p-epi junctions.
For different gain compression factors the output power-current characteristics, light emissions of quantum dot laser have been simulated and effect of gain compression factor changes on quantum dot laser is illustrated.
Open image in new window Fig. 3 Light current characteristics of quantum dot lasers for various values of gain compression factors.
Thus, dependencies of gain and absorption have been studied in quantum well structures [4] and QDs [5].
Impacts of gain compression factor on dynamic and static characteristics quantum dot laser are presented in [20, 21, 22, 23].
Going a bit further, an anisotropic stress applied onto a quantum well gain medium induces polarization dependent variations of both the gain and the refractive index19,20,21, which in turn directly impacts the nonlinear polarization dynamics of the laser itself22.
Increase of gain compression factor does not affect the threshold current of quantum dot laser.
She leads the Quantum Engineering Group in the Research Laboratory of Electronics, where her work focuses on improving both the experimental techniques and the coherent control theory of quantum bits and gaining a deeper knowledge of the mechanics of decoherence.
Quantum of Solace (2008): James Bond vs. terrorists gaining control over Bolivia's water resources.
It explains that increase of gain compression factor, decreases small-signal modulation characteristics, nevertheless, improves large-signal response of quantum dot lasers.
