Anisotropy dependence of the optical response in an impurity doped quantum dot under intense laser field

Publication date: Available online 18 May 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): F. Aydin, H. Sari, E. Kasapoglu, S. Sakiroglu, I. SokmenAbstractIn the present work, we are interested in calculating anisotropy dependence of the optical response in an ellipsoidal quantum dot with a hydrogenic impurity in the presence of high-frequency intense laser field within the framework of the effective mass approximation. The effects of the anisotropy of the system and laser field intensity on the energy levels and the respective impurity binding energies are calculated. It is shown that the electrostatic interaction between the electron and the impurity atom becomes the weakest when the structure has a spherical symmetry and in contrast to the 1s-like state, the binding energy of the 2pz-like state increases with the laser field intensity for all values of the anisotropy parameter considered. The results show that the anisotropy degree plays a fundamental role in determining the optical response of the ellipsoidal quantum dot.

Source: Physica E: Low dimensional Systems and Nanostructures - May 19, 2019 Category: Nanotechnology Source Type: research