Optoelectronics Properties Tunability by Controlled Deformation

FAHHAD ALHARBI; SABRE KAIS; MARCELO CARIGNANO; PABLO SERRA

Journal of Physics: Conference Series

IOP Publishing

Año: 2016 vol. 707 p. 12010 - 120109

Manipulating energy levels while controlling the electron localization is an essentialstep for many applications of confined systems. In this paper we demonstrate how to achieveelectron localization and induce energy level oscillation in one-dimensional quantum systems byexternally controlling the deformation of the system. From a practical point of view, the one-dimensional potentials can be realized using layered structures. In the analysis, we consideredthree different examples. The first one is a graded quantum well between confining infinite wallswhere the deformation is modeled by varying slightly the graded well. The second systems is asymmetric multiple quantum well between infinite walls under the effect of biasing voltage. Thethird system is a layered 2D hybrid perovskites where pressure is used to induce deformation.The calculations are conducted both numerically and analytically using the perturbation theory.It is shown that the obtained oscillations are associated with level avoided crossings and thatthe deformation results in changing the spatial localization of the electrons.