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A quantum mechanical approach of first order born approximation is taken to numerically model AlGaAs/GaAs Quantum Well Infrared detector that operates at long wavelength region (8–9µm). Our numerical analysis of the photocurrent spectra as well as the broadening of the same at 8.31µm peak wavelength is found to be in close resemblance with the experimental result with 8.55µm peak wavelength as reported...
We report a quantum mechanical analysis of photocurrent response and its inhomogeneous broadening in a GaAs/InGaAs/InAs Quantum-Dot-in-a-Well Infrared Photo detector studied and modeled by Green's Function Formalism. Factors that typically contribute to spectral broadening, namely quantum dot geometric dimension variance, and irregular inter-diffusion of Gallium atom from quantum well to binary Incas...
The absorption co-efficient of symmetric conical shaped InAs/InGaAs quantum dots-in-a-well (DWELL) infrared photo-detector has been calculated through Non-Equilibrium Green's Function (NEGF) approach to explain their relative magnitude resulting from various quantum dot dimensions. Kinetic equation of Green's function is solved by using method of finite difference and wave-function is calculated from...
Local Density of State (LDOS) and hence Density of State (DOS) at different energy levels of asymmetric conical shaped InAs/InGaAs quantum dots-in-a-well (DWELL) infrared photo-detector has been calculated through Non-Equilibrium Green's Function (NEGF) approach to explain the tri-band operation. Method of finite difference is used to solve the kinetic equation of Green's function and Self-energy...
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