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An optical device is used to scan a cavity. In a single incident the scanner produces what can be considered a blurred image of the intersection curve between a plane and the cavity. Mathematically the image represents an intensity function and that is obtained by integrating a certain kernel along the intersection curve. We suggest methods to determine the kernel and subsequently the intersection curve given the image. The methodology is tested with some success using an artificial, but realistic kernel and some synthetic images produced by this kernel.

In the present work, double‐barrier GaAs/AlGaAs resonant tunneling heterostructure nanodevices are investigated. Numerical results, obtained by in‐house developed software, based on a transient quantum drift‐diffusion model, are presented and discussed. In the model, quantum effects are incorporated via parameter dependencies on the carrier density gradients. Particular emphasis is given to the carrier densities and quasi‐Fermi levels as a function of applied bias, and electrostatic potential profiles inside the resonant tunneling diodes and superlattices.