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دراسة حركيات ليزر النقطة الكمية بوجود البرم == Study of Dynamics of Quantum Dot Laser with Spin
Author name:
حكمت عبد الحسين ابراهيم
General topic:
Physics
Specific topic:
Physics
Degree:
Master
University:
University Of Basrah - College Of Education For Pure Sciences
Language:
Arabic
University location:
Basrah
First pages:
26T1673 - p.pdf
Abstract:
The dynamics of VCSE QD spin polarized laser is studied based on asix equations model that takes into account the effect of number ofcontrol parameters on populations in the wetting layer for bothpolarized components and those in the quantum dot .The carrier density in the wetting layer and the quantum dot vary indifferent manner although the former lends to the later . Also thedynamics of carriers in the quantum dot shows varieties of dynamicsthat range from simple to complex one while the dynamics of carriersin the wetting layer are always simple .The polarized field related to the spin up and spin down cases sufferseffects in different manners due to the variations of these controlparameters . the intensities of both two polarized components behavioralso range from simple and end up chaotically.It appears that output ellipticity can be used as a new tool to assess the dynamical state of the laser wither it in stable , periodic , aperiodic or chaotic .The modulation of the injection current for both components or for either one led to new dynamics , the system was not able to show when it work autonomously although the model has five degrees of freedom .
