Confinement effects and tunability of quantum dots within strong confinement regime

In this age of miniaturization and nanotechnology, nano sized zero dimensional particles called quantum dots are finding wide range applications. The reasons behind their growing popularity are their controllable electrical and optical properties. This control is achieved by tuning their bandgaps by changing their shape and size. But quantum effects are most prominent only within strong confinement regime. That is, the radius of the quantum dots are much less than the exciton Bohr radius of the bulk material of which the quantum dots are made. In this paper, we have studied the confinement effects on Indium Gallium Nitride, Gallium Arsenide and Cadmium Selenide quantum dots under strong confinement. We have calculated the possible range of tunable bandgap for each of them. We also calculated the range of wavelengths that can be captured by each of these quantum dots and compared them.