Calculating absorption coefficient of Gaussian double quantum well structured with band nonparabolicity for photodetector in microwave spectra

摘要

Since the absorption coefficient of double Gaussian quantum well is analytically computed in the presence of electric field (applied along the direction of confinement) incorporating Lorentzian lineshape function for photodetector application in IR and Microwave region. The results are derived for the intraband transition between lowest three energy states, which are computed by solving time-independent Schrodinger equation by using the appropriate boundary conditions. First order band nonparabolicity of Kane type is used for near accurate estimation. Gaussian potential profile is considered due to its closest resemblance with ideal parabolic potential configuration. Structural parameters, material composition, and electric field are tailored to observe the effect on absorption coefficient. These results are important for the design of optical detector for microwave applications.