Spin coherence control of optical bistability via light hole transition in multiple quantum well waveguide embedded in a dielectric medium

Abstract

In this study, we explore the optical bistability (OB) and multistability (OM) features of probe light propagating in a multiple quantum well (MQW) nanostructure embedded in a dielectric medium. It is realized that via light hole (LH) transition between valance bands and conduction band of MQWs with different electron states, the electron spin coherence can be created which can be used to controlling the OB and OM properties. It is realized that the thickness of dielectric slab can lead to adjusting the threshold of OB in different intensities of input field. Moreover, it is found that the transition from OB to OM or vice versa can be possible by selection of suitable quantity of slab thickness. In addition, the role of relative phase of applied fields on OB and OM manners is discussed in different quantities of thickness. Our results may be suitable for developing nanoscale devices in quantum information science and technologies for future applications.