Article

Article title PHYSICAL-TOPOLOGICAL AND CIRCUIT MODELS OF FUNCTIONALLY INTEGRATED INJECTION LASERS-MODULATORS
Authors E.A. Ryndin, M.A. Denisenko, A.S. Isaeva
Section SECTION I. NANOELECTRONICS
Month, Year 09, 2015 @en
Index UDC 621.373.826
DOI
Abstract The method of constructing of functionally integrated injection laser-modulator that combines in a single nanoheterostructure injection laser and a fast modulator of optical radiation, which allows, on the one hand, to extend the range of modulation frequencies up to one terahertz, and the other, to guarantee high productivity and possibility of realization of lasers and modulators on a chip of integrated circuit in a single technological cycle. The power circuit of the laser-modulator sets the constant pump current, which provides the fixed in time total number of charge carriers in quantum wells of heterostructure active region. Amplitude modulation of laser radiation is carried out by changing the controlling field transverse to the direction of the pump current density. The change in the direction of transverse operating field at a constant pumping current leads to the relocation of charge carriers in quantum spatially shifted areas, the result of which is a spatial combination or splitting of maximums density of electrons and holes in quantum wells of the conduction and valence bands, leading to an increase or a decrease in the intensity of the laser radiation. A comparative analysis of the limitations of conventional models of injection lasers based on equations of kinetics and the equations of the fundamental system has been implemented. Based on the analysis of the fundamental system of equations of semiconductor in the diffusion-drift approximation and kinetic equations of the lasers physical-topological and circuit models were developed with different levels of detail to conduct numerical analysis of the dynamics of processes in the injection lasers-modulators with regard to their structural and topological features, doping profile, the uneven spatial distributions of electrons, holes and photons concentrations in the active region of the laser, the characteristics of the spatial distribution of the current density, the influence of peripheral areas of the laser-modulator on its characteristics.

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Keywords Injection laser; modulator of optical radiation; model.
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