Boundstates Computation for Double Quantum Well Structure with Pöschl-Teller Potential for MWIR Photodetector Design

Lowest two quantum states of a double-well-triple-barrier structure are numerically analyzed for Pöschl-Teller potential profile. Kane-type band nonparabolicity of first order is considered for rational replication purpose, and effective mass mismatch between well and barrier layers are included in the computation following the BenDaniel Duke boundary conditions. Transmission coefficient is plotted as a function of input energy flux, and peaks are identified for eigenstate determination in presence and absence of external electric field. Results are compared with that obtained for ideal rectangular geometry, and better quasi-peak characteristics speaks in favor of the proposed structure for photodetector application, where tailoring of subband energy can be achieved by means of structural parameter variations.