  Recently the interest in chalcopyrite semiconductor nanostructures has
increased because of their non-toxicity and their wide direct bandgap.
Likewise, structures with non-trivial geometry are particularly interesting
because of their electronic, optical, and magnetic properties. In the current
article, the finite element method was used in conjunction with the effective
mass approximation to theoretically investigate the properties of a
chalcopyrite AgInSe2 nanotadpole in the presence of an off-center impurity. The
morphology of the nanotadpole gives it excellent hydrodynamic properties and is
ideal for a wide range of applications. The probability densities for various
impurity positions and energy levels were obtained. The results suggested a
strong dependence of the behavior of the electron on the impurity positions and
the orientation of the wave function. The binding energy's dependence on the
nanotadpole's size and the impurity position was obtained. The dependence of
the diamagnetic susceptibility on the impurity position was calculated. An
extensive investigation of the photoionization cross-section and the
oscillatory strength was carried out for the ground and the first two excited
states as the initial states and the first twenty excited states as the final
states.
