Abstract
A theoretical model of the absorption coefficient of quantum dot devices is presented. Both of bound to bound absorption and bound to continuum absorption are taken into consideration in this model which is based on the effective mass theory and the nonequilibrium Greens function formalism. The results of the model have been compared with a published experimental work and a good agreement is obtained. The effects of the dot dimensions and electron filling on the bound to continuum absorption coefficient are also investigated. In general, increasing the dot filling increases the absorption and decreasing the dots dimensions will increase the absorption and move the absorption peak towards longer wavelengths.
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